Academic Journal

2025

• Deep-depth probability-maintained notch enabling nonlinear distortion measurement for various modulation formats
  J. Li, T. Ye, X. Su, Y. Fan, K. Zhang, S. Shi, H. Nakashima, T. Hoshida, Z. Tao, Y. Mori, and H. Hasegawa
  IEEE/Optica Journal of Lightwave Technology, vol. 43, no. 10, pp. 4722-4730, May 2025.
• Three-stage optical circuit switch architectures for intra-datacenter networking
  T. Mitsuya, R. Higuchi, T. Kuno, T. Ochiai, H. Yuasa, Y. Mori, H. Hasegawa
  IEEE/Optica Journal of Lightwave Technology, vol. 43, no. 2, pp. 400-407, January 2025.

2024

• Digital coherent receiver enabling Nyquist wavelength demultiplexing under frequency offset and receiver-side IQ impairments
  T. Kuno, Y. Mori, and H. Hasegawa
  IEEE/Optica Journal of Lightwave Technology, vol. 42, no. 5, pp. 1409-1422, March 2024.
• Demonstration of spectrum narrowing mitigation based on recurrent neural networks for ultra-dense WDM networks
  R. Shiraki, Y. Mori, and H. Hasegawa
  Optica Optics Letters, vol. 49, no. 4, pp. 947-950, February 2024.
• Demodulation framework based on machine learning for unrepeated transmission systems
  R. Shiraki, Y. Mori, and H. Hasegawa
  IEICE Transactions on Communications, vol. E107.B no. 1, pp. 39-48, January 2024.

2023

• Architecture and performance evaluation of fiber-granularity routing networks with supplemental grooming by wavelength conversion
  T. Matsuo, R. Shiraki, Y. Mori, and H. Hasegawa
  IEEE/Optica Journal of Optical Communications and Networking, vol. 15, no. 8, pp. 541-552, August 2023.
• Cost-effective network capacity upgrade by heterogeneous WDM-density with bandwidth-variable virtual direct links
  K. Hayashi, Y. Mori, and H. Hasegawa
  IEEE/Optica Journal of Optical Communications and Networking, vol. 15, no. 9, pp. D23-D32, August 2023.

2022

• RNN-based demodulation framework for spectrum narrowing in ultra-dense WDM networks
  R. Shiraki, Y. Mori, and H. Hasegawa
  IEEE Photonics Technology Letters, vol. 34, no. 18, pp. 993-996, September 2022.
• Design and evaluation of a reconfigurable optical add-drop multiplexer with flexible wave-band routing in SDM networks
  T. Kuno, Y. Mori, S. Subramaniam, M. Jinno, and H. Hasegawa
  IEEE/Optica Journal of Optical Communications and Networking, vol. 14, no. 4, pp. 248-256, April 2022. Telecom System Technology Student Award

2021

• Fragmentation-minimized periodic network-bandwidth expansion employing aligned channel slot allocation in flexible grid optical networks
  H. Hasegawa, T. Yasuda, Y. Mori, and K. Sato
  IEICE Transactions on Communications, vol. E104B, no. 12, pp. 1514-1523, December 2021.
• Design and verification of LO bank enabled by fixed-wavelength lasers and fast tunable silicon ring filters for creating large scale optical switches
  R. Matsumoto, R. Konoike, H. Matsuura, K. Suzuki, T. Inoue, Y. Mori, K. Ikeda, S. Namiki, and K. Sato
  Optica Optics Express, vol. 29, no. 24, pp. 39930-39945, November 2021.
• Design and control of highly spectrally efficient photonic networks enabled by fiber-granular routing on overlaid ring-shaped topologies
  R. Shiraki, Y. Mori, H. Hasegawa, K. Sato, and P. Monti
  IEEE/Optica Journal of Optical Communications and Networking, vol. 13, no. 11, pp. 233-243, November 2021.
• High-port-count optical circuit switches for intra-datacenter networks [Invited Tutorial]
  Y. Mori and K. Sato
  IEEE/OSA Journal of Optical Communications and Networking, vol. 13, no. 8, pp. D43-D52, August 2021. Invited Tutorial Paper
• Pre-filtering techniques for spectrum narrowing caused by optical node traversal in ultra-dense WDM networks
  K. Okamura, Y. Mori, and H. Hasegawa
  IEEE Photonics Journal, vol. 13, no. 2, Article No. 7200513, April 2021.
• Scalable and fast optical circuit switch based on colorless coherent detection: Design principle and experimental demonstration
  R. Matsumoto, T. Inoue, R. Konoike, H. Matsuura, K. Suzuki, Y. Mori, K. Ikeda, S. Namiki, and K. Sato
  IEEE/OSA Journal of Lightwave Technology, vol. 39, no. 8, pp. 2263-2274, April 2021. Telecom System Technology Award

2020

• Assessment of optical node architectures for building next generation large bandwidth networks
  M. Ganbold, T. Yasuda, Y. Mori, H. Hasegawa, F. Inuzuka, A. Hirano, and K. Sato
  IEICE Transactions on Communications, vol. E103-B, no. 6, pp. 679-689, June 2020.
• Transmission-quality-aware online network design and provisioning enabled by optical performance monitoring
  K. Kayano, Y. Mori, H. Hasegawa, K. Sato, S. Oda, S. Yoshida, and T. Hoshida
  IEICE Transactions on Communications, vol. E103-B, no.6, pp.670-678, June 2020.
• Design of seamlessly and limitlessly expandable OXC and verification tests on its versatile applicability
  R. Hashimoto, Y. Mori, H. Hasegawa, and K. Sato
  IEEE/OSA Journal of Optical Communications and Networking, vol. 12, no. 5, pp. 99-108, May 2020.
• Wavelength-division demultiplexing enhanced by silicon-photonic tunable filters in ultra-wideband optical-path networks
  Y. Mori, E. Honda, R. Shiraki, K. Suzuki, H. Matsuura, H. Kawashima, S. Namiki, K. Ikeda, and K. Sato
  IEEE/OSA Journal of Lightwave Technology, vol. 38, no. 5, pp. 1002-1009, March 2020.
• Architecture and design of coarse/fine hybrid granular routing optical networks
  Y. Ito, Y. Mori, H. Hasegawa, and K. Sato
  IEICE Transactions on Communications, vol. E103.B, no.2, pp. 118-129, February 2020.

2019

• Design and evaluation of quasi-Nyquist WDM networks utilizing widely deployed wavelength-selective switches
  R. Shiraki, Y. Mori, H. Hasegawa, and K. Sato
  OSA Optics Express, vol. 27, no 13, pp. 18549-18560, June 2019. Telecom System Technology Student Award
• Assessment of node- and link- level blocking and creating cost-effective networks in the era of large bandwidth services
  S. Yamakami, Y. Mori, H. Hasegawa, K. Sato, F. Inuzuka, and A. Hirano
  IEICE Transactions on Communications, vol. E102.B, no. 3, pp. 510-521, March 2019.
• Digital post-processing against inline spectrum narrowing caused by optical node traversals
  S. Yamaoka, Y. Mori, H. Hasegawa, and K. Sato
  IEICE Communications Express, vol. 8, no. 4, pp. 93-98, January 2019.
• Highly dense elastic optical networks enabled by grouped routing with distance-adaptive modulation
  K. Kayano, S. Yamaoka, Y. Mori, H. Hasegawa, and K. Sato
  IEEE Photonics Technology Letters, vol. 31, no. 4, pp. 295-298, January 2019.
• Design and evaluation of optical circuit switches for intra-datacenter networking
  Y. Mori, M. Ganbold, and K. Sato
  IEEE/OSA Journal of Lightwave Technology, vol. 37, no. 2, pp. 330-337, January 2019. Invited Paper
• Effectiveness of transmission-quality-aware online network design and provisioning enabled through optical performance monitoring
  K. Kayano, Y. Mori, H. Hasegawa, K. Sato, S. Oda, S. Yoshida, and T. Hoshida
  IEICE Communications Express, vol. 8, no. 4, pp. 81-86, January 2019.

2018

• A large-scale optical circuit switch using fast wavelength-tunable and bandwidth-variable filters
  M. Ganbold, H. Nagai, Y. Mori, K. Suzuki, H. Matsuura, K. Tanizawa, K. Ikeda, S. Namiki, H. Kawashima, and K. Sato
  IEEE Photonics Technology Letters, vol. 30, no. 16, pp. 1439-1442, August 2018.
• Design and verification of large-scale optical circuit switch using ULCF AWGs for datacenter application
  H. Nagai, Y. Mori, H. Hasegawa, and K. Sato
  IEEE/OSA Journal of Optical Communications and Networking, vol. 10, no. 7, pp. B82-B89, July 2018.
• First demonstration of subsystem-modular optical cross-connect using single-module 6 × 6 wavelength-selective switch
  R. Hashimoto, S. Yamaoka, Y. Mori, H. Hasegawa, K. Sato, K. Yamaguchi, K. Seno, and K. Suzuki
  IEEE/OSA Journal of Lightwave Technology, vol. 36, no. 7, pp. 1435-1442, April 2018. Invited Paper

2017

• Fast optical circuit switch for intra-datacenter networking
  K. Ueda, Y. Mori, H. Hasegawa, H. Matsuura, K. Ishii, H. Kuwatsuka, S. Namiki, T. Watanabe, and K. Sato
  IEICE Transactions on Communications, vol. E100-B, no. 10, pp. 1740-1746, October 2017. Invited Paper
• Spectral efficiency maximization of grouped routing optical networks with shared protection
  T. Ishikawa, Y. Mori, H. Hasegawa, and K. Sato
  IEEE/OSA Journal of Optical Communications and Networking, vol. 9, no. 10, pp. 864-875, October 2017.
• Large-scale optical node utilizing MxM WSSs optimally configured for traffic distribution
  M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
  IEEE Photonics Technology Letters, vol. 29, no. pp. 1293-1296, August 2017.
• Highly reliable and large-scale subsystem-modular optical cross-connect
  S. Yamakami, Y. Mori, H. Hasegawa, and K. Sato
  OSA Optics Express, vol. 25, no. 15, pp. 17982-17994, July 2017.
• Compact OXC architecture, design and prototype development for flexible waveband routing optical networks
  T. Ishikawa, Y. Mori, H. Hasegawa, S. Subramaniam, K. Sato, and O. Moriwaki
  OSA Optics Express, vol. 25, no. 14, pp. 15838-15853, July 2017.
• Algorithm for raising OXC port count to meet traffic growth at minimum cost
  K. Sato, Y. Mori, H. Hasegawa, and K. Sato
  IEEE/OSA Journal of Optical Communications and Networking, vol. 9, no. 2, pp. A263-A270, February 2017. Highly Ranked Paper
• Tipping point for the future scalable OXC: what size MxM WSS is needed?
  M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
  IEEE/OSA Journal of Optical Communications and Networking, vol. 9, no. 1, pp. A18-A25, February 2017. Highly Ranked Paper
• Large-scale optical switch utilizing multistage cyclic arrayed-waveguide gratings for intra-datacenter interconnection
  K. Ueda, Y. Mori, H. Hasegawa, and K. Sato
  IEEE Photonics Journal, vol. 9, no. 1, Article No. 7800412, February 2017.

2016

• Dynamic router performance control utilizing support vector machines for energy consumption reduction
  H. Kawase, Y. Mori, H. Hasegawa, and K. Sato
  IEEE Transactions on Network and Service Management, vol. 13, no. 4, pp. 860-870, December 2016.
• Survivable grouped routing optical networks with dedicated path protection
  H. Hasegawa, Y. Mori, and K. Sato
  IEICE Transactions on Communications, vol. E99-B, no. 7, pp.1435-1444, July 2016.
• Highly spectral efficient networks based on grouped optical path routing
  Y. Terada, Y. Mori, H. Hasegawa, and K. Sato
  OSA Optics Express, vol. 24, no. 6, pp. 6213-6228, March 2016.
• Large-scale and simple-configuration optical switch enabled by asymmetric-port-count subswitches
  K. Ueda, Y. Mori, H. Hasegawa, K. Sato, and T. Watanabe
  IEEE Photonics Journal, vol. 8, no. 2, Article No. 0601610, March 2016.
• Novel optical-node architecture utilizing asymmetric-multiport wavelength-selective switches
  M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
  IEEE Photonics Journal, vol. 8, no. 2, Article No. 0601210, March 2016.
• Large-scale optical-switch prototypes utilizing cyclic arrayed-waveguide gratings for datacenters
  K. Ueda, Y. Mori, H. Hasegawa, and K. Sato
  IEEE/OSA Journal of Lightwave Technology, vol. 34, no. 2, pp. 608-617, January 2016.

2015

• Experimental verification of highly scalable OXC that consists of subsystem-modular express-switch part and multicast-switch-based add/drop part enabling total throughput of 314 Tbps
  S. Takashina, H. Ishida, M. Niwa, Y. Mori, H. Hasegawa, K. Sato, and T. Watanabe
  OSA Optics Express, vol. 23, no. 11, pp. 14796-14805, May 2015.
• Wavelength-tunable filters utilizing arrayed waveguide gratings for colorless/directionless/contentionless optical signal drop in ROADMs
  S. Takashina, Y. Mori, H. Hasegawa, K. Sato, and T. Watanabe
  IEEE Photonics Journal, vol. 7, no. 1, Article No. 7100511, February 2015.

2014

• In-band estimation of optical signal-to-noise ratio from equalized signals in digital coherent receivers
  Md. S. Faruk, Y. Mori, and K. Kikuchi
  IEEE Photonics Journal, vol. 6, no. 1, Article No. 7800109, February 2014.

2012

• Novel configuration of finite-impulse-response filters tolerant to carrier-phase fluctuations in digital coherent receivers for higher-order quadrature amplitude modulation signals
  Y. Mori, C. Zhang, and K. Kikuchi
  OSA Optics Express, vol. 20, no. 24, pp. 26236-26251, November 2012.

2010

• Multi-impairment monitoring from adaptive finite-impulse-response filters in a digital coherent receiver
  Md. S. Faruk, Y. M ori, C. Zhang, K. Katoh, and K. Kikuchi
  OSA Optics Express, vol. 18, no. 26, pp. 26929-26936, December 2010.

2009

• Unrepeated 200-km transmission of 40-Gbit/s 16-QAM signals using digital coherent receiver
  Y. Mori, C. Zhang, K. Igarashi, K. Katoh, and K. Kikuchi
  OSA Optics Express, vol. 17, no. 3, pp. 1435-1441, February 2009.
• Ultrafast operation of digital coherent receivers using their time-division demultiplexing function
  C. Zhang, Y. Mori, K. Igarashi, K. Katoh, and K. Kikuchi
  IEEE/OSA Journal of Lightwave Technology, vol. 27, no. 3, pp. 224-232, February 2009.

International Conference

2025

• Layered multiband network architecture with spatially parallel bypass for selective and cost-efficient SDM deployment
  H. Yuasa, T. Kuno, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, W. Maeda, S. Yanagimachi, and H. Hasegawa
  European Conference on Optical Communication (ECOC), Copenhagen, Denmark, September 2025.
• A hybrid FXC-WXC network architecture with low-cost pluggable transceivers for metro-scale optical networks
  S. Shimoi, H. Yuasa, T. Sekizuka, T. Kuno, Y. Mori, W. Maeda, S. Yanagimachi, and H. Hasegawa
  European Conference on Optical Communication (ECOC), Copenhagen, Denmark, September 2025.
• Spectrum narrowing mitigation via optoelectrical partial-response spectrum shaping
  T. Sekizuka, R. Higuchi, K. Satake, T. Kuno, Y. Mori, and H. Hasegawa
  OptoElectronics and Communications Conference / International Conference on Photonics in Switching and Computing (OECC/PSC), paper ThB1-2, Sapporo, Japan, June/July 2025. Best Paper Award
• Mixed path-granularity and grouped-path routing networks
  Y. Hirai, T. Kuno, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, and H. Hasegawa
  OptoElectronics and Communications Conference / International Conference on Photonics in Switching and Computing (OECC/PSC), paper TuF2-3, Sapporo, Japan, June/July 2025.
• Demonstration of multigranular-routing layered network with impairment-aware modulation format selection
  H. Yuasa, T. Kuno, T. Sekizuka, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, W. Maeda, S. Yanagimachi, and H. Hasegawa
  Optica Optical Fiber Communication Conference (OFC), paper Tu2H.2, San Francisco, USA, March 2025.
• Analytical and numerical hybrid capacity estimation method for multi-band elastic optical network
  S. Shimoi, H. Yuasa, T. Kuno, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, and H. Hasegawa
  Proc. SPIE 13374, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XIV, 1337409, March 2025.
• EEPN mitigation by local oscillator phase isolation with dual pilot carriers
  T. Sekizuka, T. Kuno, R. Higuchi, R. Shiraki, Y. Mori, and H. Hasegawa
  Proc. SPIE 13374, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XIV, 133740C, March 2025.
• Infinitely scalable modular OXC node architecture with sparse and regular intra-node inter-connection
  A. Wada, T. Kuno, Y. Mori, W. Maeda, S. Yanagimachi, and H. Hasegawa
  Proc. SPIE 13374, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XIV, 133740H, March 2025.

2024

• Laser-frequency transition measurement using coherent receivers with coded local oscillators
  K. Kagawa, T. Kuno, R. Higuchi, Y. Mori, and H. Hasegawa
  IEEE Photonics Conference (IPC), paper MD1.2, Rome, Italy, November 2024.
• Robustness of adaptive symbol decision against transmitter impairments on GS-QAM signals
  T. Sekizuka, T. Kuno, R. Higuchi, Y. Mori, and H. Hasegawa
  IEEE Photonics Conference (IPC), paper TuF3.3, Rome, Italy, November 2024.
• 11,520×11,520 optical circuit switch for intra- and inter-datacenter converged networks
  T. Kuno, Y. Mori, and H. Hasegawa
  IEEE Photonics Conference (IPC), paper MD2.2, Rome, Italy, November 2024.
• Cost-effective network-facility upgrade scheme enabling incremental transition to multiband optical networks
  H. Yuasa, Y. Mori, and H. Hasegawa
  European Conference on Optical Communication (ECOC), paper W2A.91, Frankfurt, Germany, September 2024.
• Demonstration of 12,288 × 12,288 optical circuit switch with 17.2 Pbps throughput for intra-datacentre networks
  T. Kuno, Y. Mori, and H. Hasegawa
  European Conference on Optical Communication (ECOC), paper W2A.125, Frankfurt, Germany, September 2024.
• Demonstration of low-complexity digital coherent receivers for intra-datacenter networks
  T. Kuno, T. Mitsuya, Y. Mori, and H. Hasegawa
  IEEE Summer Topicals Meeting Series Co-Located with Photonics in Switching and Computing, paper TuA2.4, Bridgetown, Barbados, July 2024.
• Multi-layered optical network architecture with coarse-granularity-routing optical bypass
  H. Yuasa, K. Cruzado, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, K. Hosokawa, S. Yanagimachi, and H. Hasegawa
  International Conference on Optical Network Design and Modeling (ONDM), Madrid, Spain, July 2024.
• Experimental demonstration of NN-based symbol decision to mitigate transmitter impairments
  T. Sekizuka, T. Kuno, R. Higuchi, T. Ochiai, Y. Mori, and H. Hasegawa
  OptoElectronics and Communications Conference (OECC), paper MoB1-4, Melbourne, Australia, June 2024.
• Capacity-bound evaluation and routing and spectrum assignment for elastic optical path networks with distance-adaptive modulation
  K. Cruzado, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, and H. Hasegawa
  Optica Optical Fiber Communication Conference (OFC), paper W3C.6, San Diego, USA, March 2024.
• Cost-effective capacity enhancement of survivable optical networks by supplemental band expansion and backup resource sharing
  D. Saito, Y. Mori, K. Hosokawa, S. Yanagimachi, and H. Hasegawa
  Optica Optical Fiber Communication Conference (OFC), paper W1C.2, San Diego, USA, March 2024.
• Intra-datacenter optical circuit switch architecture with multi-band transmission technologies
  T. Kuno, R. Higuchi, K. Satake, H. Yuasa, Y. Mori, and H. Hasegawa
  Optica Optical Fiber Communication Conference (OFC), paper M2G.3, San Diego, USA, March 2024.
• Robustness of digital subcarrier systems to laser phase noise and chromatic dispersion
  K. Satake, Y. Mori, R. Shiraki, and H. Hasegawa
  Proc. SPIE 12894, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XIII, 1289403, March 2024. Optical Communications Best Student Paper Award

2023

• Wavelength division demultiplexing of Nyquist WDM signals under frequency offset and receiver-side IQ impairments
  T. Kuno, Y. Mori, and H. Hasegawa
  European Conference on Optical Communication (ECOC), paper We.A.7.4, Glasgow, United Kingdom, October 2023.
• Experimental demonstration of 128×128 optical cross-connects with 2.45 Pbps throughput
  T. Ochiai, T. Kuno, R. Munakata, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, and H. Hasegawa
  European Conference on Optical Communication (ECOC), paper Th.B.6.4, Glasgow, United Kingdom, October 2023.
• Transceiver-impairment mitigation enabled by adaptive symbol decision with neural networks
  T. Ochiai, R. Higuchi, T. Kuno, R. Shiraki, Y. Mori, and H. Hasegawa
  International Conference on Photonics in Switching and Computing (PSC), paper Fr2B.2, Mantova, Italy, September 2023.
• Effective capacity estimation based on cut-set load analysis in optical path networks
  K. Cruzado, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, and H. Hasegawa
  International Conference on Photonics in Switching and Computing (PSC), paper Th4A.2, Mantova, Italy, September 2023.
• 4.71-Pbps-throughput multiband OXC based on space- and wavelength-granular hybrid switching
  T. Kuno, T. Ochiai, R. Higuchi, K. Satake, K. Cruzado, R. Munakata, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, and H. Hasegawa
  International Conference on Photonics in Switching and Computing (PSC), paper Th2A.2, Mantova, Italy, September 2023. Best Student Paper Award
• Optical switch architecture for intra-datacenter network
  Y. Mori and H. Hasegawa
  Optica Advanced Photonics Congress (APC), paper SpTu1E.1, Busan, Korea, July 2023. Invited Paper
• Adaptive joint pre-/post-equalization of spectrum narrowing caused by cascaded photonic nodes
  Y. Ishikawa, R. Shiraki, Y. Mori, and H. Hasegawa
  Optica Advanced Photonics Congress (APC), paper NeTu3B.3, Busan, Korea, July 2023. Student Paper Award
• Low-cost coherent transceivers with quantization noise mitigation function enabled by neural networks
  T. Ochiai, R. Shiraki, Y. Mori, and H. Hasegawa
  Optica Advanced Photonics Congress (APC), paper JW2E.1, Busan, Korea, July 2023. Student Paper Award
• Modulation and demodulation method robust against laser phase noise
  R. Higuchi, T. Kuno, R. Shiraki, Y. Mori, and H. Hasegawa
  Conference on Lasers and Electro-Optics/Europe – European Quantum Electronics Conference (CLEO®/Europe-EQEC), paper CI-6.4, Munich, Germany, June 2023.
• Architecture and performance evaluation of bundled-path-routing multi-band optical networks
  R. Munakata, T. Kuno, Y. Mori, S. C. Lin, M. Matsuura, S. Subramaniam, and H. Hasegawa
  Optica Optical Fiber Communication Conference (OFC), paper M4G.8, San Diego, USA, March 2023.
• Cost-effective network capacity enhancement with multi-band virtual bypass links
  D. Saito, Y. Mori, K. Hosokawa, S. Yanagimachi, and H. Hasegawa
  Optica Optical Fiber Communication Conference (OFC), paper M4G.4, San Diego, USA, March 2023.
• Optical path management based on machine learning for optical networks
  R. Shiraki, Y. Mori, and H. Hasegawa
  Proc. SPIE 12429, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XII, 124290M, March 2023. Invited Paper

2022

• Efficient network capacity expansion by differentiated WDM-density with bandwidth-variable virtual direct links
  K. Hayashi, Y. Mori, and H. Hasegawa
  IEEE Future Networks World Forum (FNWF), Montreal, Canada, October 2022.
• Spatially-jointed flexible waveband routing optical networks adopting shared path protection
  R. Munakata, Y. Mori, S. Subramaniam, M. Jinno, and H. Hasegawa
  International Workshop on Reliable Networks Design and Modeling (RNDM), paper 1-7, Compiegne, France, September 2022. Best Student Paper Award
• Reinforcement-learning-based network design and control with stepwise reward variation and link-adjacency embedding
  K. Cruzado, R. Shiraki, Y.Mori, T. Tanaka, K. Higashimori, F. Inuzuka, T. Ohara, and H. Hasegawa
  European Conference on Optical Communication (ECOC), paper We2B.3, Basel, Switzerland, September 2022.
• Highly reliable and large-scale optical switch for intra-datacentre networks
  T. Mitusya, T. Ochiai, T. Kuno, Y. Mori, H. Hasegawa, and K. Sato
  European Conference on Optical Communication (ECOC), paper We5.49, Basel, Switzerland, September 2022.
• Constellation-shaped 64QAM robust against phase noise in intra-datacenter networks
  J. Sakano, R. Shiraki, Y. Mori, and H. Hasegawa
  OptoElectronics and Communications Conference/International Conference on Photonics in Switching and Computing (OECC/PSC), paper WF3-4, Toyama, Japan, July 2022.
• Optical performance monitoring using adaptive FIR filters for constellation-shaped higher-order QAM signals
  N. Tsuchida, T. Kuno, J. Sakano, Y. Mori, and H. Hasegawa
  OptoElectronics and Communications Conference/International Conference on Photonics in Switching and Computing (OECC/PSC), paper ME1-5, Toyama, Japan, July 2022.
• Demonstration of high-throughput intra-datacenter switches using interleaved AWGs for Nyquist WDM
  T. Kuno, T. Mitsuya, Y. Mori, H. Hasegawa, and K. Sato
  Optica Optical Fiber Communication Conference (OFC), San Diego, USA, paper Th3A.2, March 2022.
• Design and dynamic control of fiber-granular routing networks with next-generation optical paths
  T. Matsuo, R. Shiraki, Y. Mori, and H. Hasegawa
  Optica Optical Fiber Communication Conference (OFC), San Diego, USA, paper W3F.6, March 2022.
• Measurement method of transmitter IQ imbalance in digital coherent communication systems
  N. Tsuchida, T. Kuno, Y. Mori, and H. Hasegawa
  Proc. SPIE 12027, Metro and Data Center Optical Networks and Short-Reach Links V, 1202708, March 2022.

2021

• Dynamic routing and spectrum allocation based on actorcritic learning for multi-fiber elastic optical networks
  Y. Wang, Y. Mori, and H. Hasegawa
  International Conference on Photonics in Switching and Computing (PSC), paper W1B.3, Virtual Event, September 2021.
• Joint modulation/demodulation optimization without the differentiable channel model in the presence of phase noise
  J. Sakano, Y. Mori, and H. Hasegawa
  International Conference on Photonics in Switching and Computing (PSC), paper Tu5A.6, Virtual Event, September 2021.
• Design and performance evaluation of resilient optical path networks that adopt spatially-jointed flexible waveband routing
  R. Munakata, Y. Mori, S. Subramaniam, M. Jinno, and H. Hasegawa
  International Conference on Optical Network Design and Modeling (ONDM), paper NPR.1, Gothenburg, Sweden, July 2021.
• Measurement of transmitter IQ skew in high-speed digital coherent communication systems
  N. Tsuchida, T. Kuno, Y. Mori, and H. Hasegawa
  OptoElectronics and Communications Conference (OECC), paper T4B.7, Hong Kong, China, July 2021.
• Performance evaluation of dynamic fiber-granular routing networks with next-generation optical paths
  T. Matsuo, R. Shiraki, Y. Mori, and H. Hasegawa
  OptoElectronics and Communications Conference (OECC), paper T2A.8, Hong Kong, China, July 2021.
• Estimation for IQ skew of a transmitter in digital coherent communication systems
  N. Tsuchida, T. Kuno, Y. Mori, and H. Hasegawa
  Conference on Lasers and Electro-Optics/Europe – European Quantum Electronics Conference (CLEO®/Europe-EQEC), paper CI-2.5, Munich, Germany, June 2021.
• Experimental evaluation of optical cross-connects with flexible waveband routing function for SDM networks
  T. Kuno, Y. Mori, S. Subramaniam, M. Jinno, and H. Hasegawa
  OSA Optical Fiber Communication Conference (OFC), paper Th4E.3, San Diego, USA, June 2021.
• Evaluation of low-complexity digital coherent receivers for short-reach transmission systems
  T. Kuno, Y. Mori, and H. Hasegawa
  Proc. SPIE 11712, Metro and Data Center Optical Networks and Short-Reach Links IV, 117120C, March 2021.

2020

• Large-scale optical switch architectures for intra-datacentre networks
  Y. Mori and K. Sato
  European Conference on Optical Communication (ECOC), paper Tu5J-1, Brussels, Belgium, December 2020. Invited Tutorial Paper
• Large-scale and fast optical circuit switch for coherent detection using tunable local oscillators formed with wavelength bank and widely-tunable silicon ring filters
  R. Matsumoto, R. Konoike, H. Matsuura, K. Suzuki, T. Inoue, Y. Mori, K. Ikeda, S. Namiki, and K. Sato
  European Conference on Optical Communication (ECOC), paper Th1J-2, Brussels, Belgium, December 2020.
• Joint pre-emphasis and partial-response coding for spectrum narrowing caused by repeated optical-node traversal in ultra-dense WDM networks
  K. Okamura, Y. Mori, and H. Hasegawa
  European Conference on Optical Communication (ECOC), paper Mo2D-8, Brussels, Belgium, December 2020.
• Demonstration of 4.3 Pbps optical circuit switching for intra-datacentre networks based on spatial super-channels
  E. Honda, Y. Mori, H. Hasegawa, and K. Sato
  European Conference on Optical Communication (ECOC), paper Th1J-1, Brussels, Belgium, December 2020. Best Student Paper Award Finalist
• Evaluation of optical circuit switches for SDM-based intra-datacenter networks
  E. Honda, Y. Mori, H. Hasegawa, and K. Sato
  OptoElectronics and Communications Conference (OECC), T1-3.4, Taipei, Taiwan, October 2020.
• Resource assignment based on core-state value evaluation for crosstalk and spectrum fragments in SDM elastic optical networks
  Y. Wang, Y. Mori, and H. Hasegawa
  OptoElectronics and Communications Conference (OECC), paper T8-2.6, Taipei, Taiwan, October 2020. Best Student Paper Award
• Low-complexity DSP configuration for short-reach transmission systems
  T. Kuno, Y. Mori, and H. Hasegawa
  OptoElectronics and Communications Conference (OECC), paper VP95, Taipei, Taiwan, October 2020.
• Low-complexity digital coherent receivers for short-reach transmission systems
  T. Kuno, Y. Mori, and H. Hasegawa
  IEEE Photonics Conference (IPC), paper WG2.2, Vancouver, BC, Canada, October 2020.
• High-throughput and high-port-count optical cross-connects using flexible waveband routing
  T. Kuno, Y. Mori, S. Subramaniam, M. Jinno, and H. Hasegawa
  International Conference on Optical Network Design and Modeling (ONDM), paper S6.4, Barcelona, Spain, May 2020. Best Student Paper Award
• A 2.15 Pbps throughput optical cross-connect with flexible waveband routing
  T. Kuno, Y. Mori, and H. Hasegawa
  IEEE International Conference on Photonics (ICP), paper D1AM-S3, Kelantan, Malaysia, March 2020. Best Paper Award
• High-throughput optical circuit switch for intra-datacenter networks based on spatial super-channels
  E. Honda, Y. Mori, H. Hasegawa, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper W1F.2, San Diego, USA, March 2020.
• Dynamically controlled flexible-grid networks based on semi-flexible spectrum assignment and network-state-value evaluation
  R. Shiraki, Y. Mori, H. Hasegawa, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper M1B.4, San Diego, USA, March 2020.
• Scalable and fast optical circuit switch created with silicon-photonic tunable-filter-based local oscillator bank and colorless coherent detection
  R. Matsumoto, T. Inoue, R. Konoike, H. Matsuura, K. Suzuki, Y. Mori, K. Ikeda, S. Namiki, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper W2A.36, San Diego, USA, March 2020.
• Highly spectrally efficient metro networks that adopt fiber-level granular routing on overlaid line-/ring-shaped virtual topologies
  R. Shiraki, Y. Mori, H. Hasegawa, K. Sato, and P. Monti
  Proc. SPIE 11308, Metro and Data Center Optical Networks and Short-Reach Links III, 1130809, January 2020.
• Quasi-Nyquist WDM networks using receiver-side quadrature duo-binary/quaternary spectrum shaping
  K. Okamura, Y. Mori, H. Hasegawa, and K. Sato
  Proc. SPIE 11308, Metro and Data Center Optical Networks and Short-Reach Links III, 113080E, January 2020.

2019

• Intra- and inter-datacentre converged networks utilising Kramers-Kronig receivers
  E. Honda, Y. Mori, H. Hasegawa, and K. Sato
  European Conference on Optical Communication (ECOC), paper Th.1.A.5, Dublin, Ireland, September 2019.
• Dynamic control of transparent optical networks with adaptive state-value assessment enabled by reinforcement learning
  R. Shiraki, Y. Mori, H. Hasegawa, and K. Sato
  International Conference on Transparent Optical Networks (ICTON), paper Sa.A3.4, Angers, France, July 2019. Best Student Oral Presentation Award
• Feasibility test of large-scale (1,424×1,424) optical circuit switches utilizing commercially available tunable lasers
  E. Honda, Y. Mori, H. Hasegawa, and K. Sato
  OptoElectronics and Communications Conference / International Conference on Photonics in Switching and Computing (OECC/PSC), paper WA1-3, Fukuoka, Japan, July 2019.
• Evaluation of WSS characteristics in highly dense WDM networks
  K. Okamura, S. Yamaoka, Y. Mori, H. Hasegawa, and K. Sato
  OptoElectronics and Communications Conference / International Conference on Photonics in Switching and Computing (OECC/PSC), paper MF2-5, Fukuoka, Japan, July 2019.
• Design of survivable coarse/fine hybrid granular routing optical networks based on iterative path-pair-loop inflation
  K. Itakura, Y. Mori, H. Hasegawa, and K. Sato
  International Conference on the Design of Reliable Communication Networks (DRCN), Coimbra, Portugal, March 2019.
• Verification of high performance and wide applicability of seamlessly expandable and limitless OXC
  R. Hashimoto, Y. Mori, H. Hasegawa, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper W2A.24, San Diego, USA, March 2019.
• Demonstration of quasi-Nyquist WDM networks using widely deployed wavelength-selective switches
  R. Shiraki, Y. Mori, H. Hasegawa, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper M1A.7, San Diego, USA, March 2019.
• Novel network architecture enabling quasi-Nyquist wavelength-division multiplexing
  R. Shiraki, S. Yamaoka, Y. Mori, H. Hasegawa, and K. Sato
  Proc. SPIE 10946, Metro and Data Center Optical Networks and Short-Reach Links II, 109460C, February 2019.

2018

• Novel demodulation framework based on quadrature duo-binary/quaternary/octernary spectrum shaping and MLSE for mitigating spectrum narrowing caused by node traversals
  S. Yamaoka, Y. Mori, H. Hasegawa, and K. Sato
  European Conference on Optical Communication (ECOC), paper Mo4F.5, Rome, Italy, September 2018.
• Fast optical circuit switch using monolithically integrated silicon-photonic space switch and wavelength-tuneable filter
  Y. Mori, M.-E. Ganbold, R. Shiraki, K. Suzuki, H. Matsuura, H. Kawashima, S. Namiki, K. Ikeda, and K. Sato
  European Conference on Optical Communication (ECOC), paper Mo3H.4, Rome, Italy, September 2018.
• A new framework for nation-wide networking in future datacenter-traffic centric era
  K. Kayano, Y. Mori, H. Hasegawa, K. Sato, F. Inuzuka, and A. Hirano
  International Conference on Photonics in Switching and Computing (PSC), paper Fr3A.5, Limassol, Cyprus, September 2018.
• Architecture and design of quasi-Nyquist WDM networks with flexible grid granular switching
  R. Shiraki, Y. Mori, H. Hasegawa, and K. Sato
  International Conference on Photonics in Switching and Computing (PSC), paper Fr3A.5, Limassol, Cyprus, September 2018.
• Novel FM-Noise spectrum measurement based on three-wave interference
  S. Yamaoka, Y. Mori, H. Hasegawa, and K. Sato
  Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR), paper W4I.7, Hong Kong, China, July 2018.
• Novel demodulation algorithm based on duo-binary spectrum shaping and MLSE for mitigating spectrum narrowing caused by multiple node traversals
  S. Yamaoka, Y. Mori, H. Hasegawa, and K. Sato
  Advanced Photonics, paper SpW1G.5, Zurich, Swiss, July 2018.
• 1,024x1,024 optical circuit switch using wavelength-tunable and bandwidth-variable silicon photonic filter
  M.-E. Ganbold, H. Nagai, Y. Mori, H. Hasegawa, and K. Sato
  Advanced Photonics, paper SpW1G.5, Zurich, Swiss, July 2018. Best Student Paper Award 1st Prize
• Assessment of optical cross-connect architectures for the creation of next generation optical networks
  M.-E. Ganbold, T. Yasuda, Y. Mori, H. Hasegawa, and K. Sato
  OptoElectronics and Communications Conference (OECC), paper 6A1-5, Jeju, Korea, July 2018.
• Next-generation ROADM employing bandwidth-adaptive silicon-photonic filters for flexible drop operation
  Y. Mori, K. Ueda, K. Suzuki, H. Matsuura, K. Tanizawa, K. Ikeda, S. Namiki, H. Kawashima, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper Th3H.5, San Diego, USA, March 2018.
• Large-scale optical circuit switch architecture for intra-datacenter networking
  Y. Mori and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper Th3H.3, San Diego, USA, March 2018. Invited Paper
• Spectrally efficient and highly resilient grouped routing network enhanced with optical performance monitoring
  K. Kayano, H. Saito, Y. Mori, H. Hasegawa, K. Sato, S. Oda, S. Yoshida, and T. Hoshida
  OSA Optical Fiber Communication Conference (OFC), paper M3J.8, San Diego, USA, March 2018.
• Fragmentation-minimized transponder upgrading employing channel bandwidth aligned slot allocation in flexible grid optical networks
  H. Hasegawa, T. Yasuda, Y. Mori, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper M3J.6, San Diego, USA, March 2018.
• Spectral utilization efficient coarse granular routing optical networks with resiliency against multiple failures
  T. Ishikawa, Y. Mori, H. Hasegawa, and K. Sato
  Conference on Innovation in Clouds, Internet and Networks and Workshops (ICIN), Paris, France, February 2018.
• Large-scale optical node architecture enabling spectral-efficiency maximization in ultra-dense WDM networks
  S. Yamaoka, R. Hashimoto, Y. Mori, H. Hasegawa, and K. Sato
  Proc. SPIE 10560, Metro and Data Center Optical Networks and Short-Reach Links, 105600G, January 2018.
• Demonstration of 153.6-Tbps throughput from 1,536x1,536 optical switch with uniform-loss and cyclic-frequency AWGs
  H. Nagai, Y. Mori, H. Hasegawa, and K. Sato
  Proc. SPIE 10560, Metro and Data Center Optical Networks and Short-Reach Links, 105600P, January 2018. Optical Communications Best Technical Paper Award

2017

• Joint pre-, inline-, and post-compensation of spectrum narrowing caused by traversing multiple optical nodes
  Y. Mori, H. Hasegawa, and K. Sato
  European Conference on Optical Communication (ECOC), paper P1.SC3.45, Gothenburg, Sweden, September 2017.
• First demonstration of subsystem-modular optical cross-connect using single-module 6x6 WSS
  R. Hashimoto, S. Yamaoka, Y. Mori, H. Hasegawa, K. Sato, K. Yamaguchi, K. Seno, and K. Suzuki
  European Conference on Optical Communication (ECOC), paper Tu.2.F.2, Gothenburg, Sweden, September 2017. Best Student Paper Award Finalist, Top-scoring Paper, and Journal Invitation
• Silicon photonics C-band tunable filter for large-scale optical circuit switches
  K. Suzuki, K. Tanizawa, S. Suda, H. Matsuura, K. Ikeda, Y. Mori, K. Sato, S. Namiki, and H. Kawashima
  Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR), paper P3-128, Singapore, Singapore, July/August, 2017.
• Novel subcarrier multiplexing and subcarrier-synchronous phase estimation tolerant to laser phase noise
  D. Martinez, Y. Mori, H. Hasegawa, and K. Sato
  Advanced Photonics, paper SpW1F, New Orleans, Louisiana, USA, July 2017.
• Novel laser-linewidth measurement based on three-wave interference using digital coherent receiver
  S. Yamaoka, Y. Mori, and K. Sato
  Conference on Lasers and Electro-Optics/Europe – European Quantum Electronics Conference (CLEO®/Europe-EQEC), paper CI-6.2, Munich, Germany, June 2017.
• Large-scale optical circuit switch architecture for intra-datacentre networking
  Y. Mori, K. Ueda, H. Hasegawa, and K. Sato
  Conference on Lasers and Electro-Optics/Europe – European Quantum Electronics Conference (CLEO®/Europe-EQEC), paper CI-5.3, Munich, Germany, June 2017. Invited Paper
• Dynamic control of coarse/fine hybrid granular routing optical networks
  Y. Ito, Y. Mori, H. Hasegawa, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper Th4F.3, Los Angeles, USA, March 2017.
• Highly reliable large-scale optical cross-connect architecture utilizing MxM wavelength-selective switches
  S. Yamakami, M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper Th3K.5, Los Angeles, USA, March 2017.
• Optical tunable filter for gridless ROADM
  M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper Tu3F.4, Los Angeles, USA, March 2017.
• Novel intra- and inter-datacenter converged network exploiting space- and wavelength-dimensional switches
  K. Ueda, Y. Mori, H. Hasegawa, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper M3K.2, Los Angeles, USA, March 2017.
• Efficient network expansion strategy for elastic optical networks that considers channel capacity upgrades
  T. Yasuda, Y. Mori, H. Hasegawa, and K. Sato
  Proc. SPIE 10129, Optical Metro Networks and Short-Haul Systems IX, 1012909, January 2017.
• Impairment mitigation in noncoherent optical transmission enabled with machine learning for intra-datacenter networks
  K. Ito, Y. Mori, H. Hasegawa, and K. Sato
  Proc. SPIE 10131, Next-Generation Optical Networks for Data Centers and Short-Reach Links IV, 101310A, January 2017.

2016

• Demonstration of virtual direct link optical network
  Y. Ito, M. Niwa, K. Ueda, Y. Mori, H. Hasegawa, and K. Sato
  IEEE Photonics Conference (IPC), paper WD1.5, Hawaii, USA, October 2016.
• Experimental demonstration of 2,160x2,160 optical circuit switch for intra-datacenter networking
  K. Ueda, Y. Mori, H. Hasegawa, K. Sato, H. Matsuura, K Ishii, H. Kuwatsuka, and S. Namiki
  IEEE Photonics Conference (IPC), paper MB4.2, Hawaii, USA, October 2016.
• Highly reliable and cost-effective large-scale optical cross-connect architecture
  S. Yamakami, M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
  IEEE Photonics Conference (IPC), paper WD2.4, Hawaii, USA, October 2016.
• Spectral-efficiency maximization with subcarrier-multiplexed hybrid-QAM signals adaptive to distance and hop count
  Y. Isono, M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
  European Conference on Optical Communication (ECOC), paper Th.1.E.3, Düsseldorf, Germany, September 2016.
• Optical networking utilizing virtual direct links
  Y. Ito, Y. Mori, H. Hasegawa, and K. Sato
  European Conference on Optical Communication (ECOC), paper W.4.P1.SC6.63, Düsseldorf, Germany, September 2016.
• MxM WSS based ROADM architecture with topology-insensitive routing performance
  M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
  European Conference on Optical Communication (ECOC), paper W.4.P1.SC4.38, Düsseldorf, Germany, September 2016.
• Large-scale optical circuit switch for intra-datacenter networking using silicon-photonic multicast switch and tunable filter
  K. Ueda, Y. Mori, H. Hasegawa, K. Sato, K. Suzuki, H. Matsuura, K. Tanizawa, S. Suda, K. Ikeda, S. Namiki, H. Kawashima, S. Nakamura, S. Yanagimachi, and A. Tajima
  European Conference on Optical Communication (ECOC), paper W.2.F.2, Düsseldorf, Germany, September 2016.
• Recent progress in large-scale optical switches for intra-datacenter interconnection
  K. Ueda, Y. Mori, H. Hasegawa, and K. Sato
  Progress In Electromagnetic Research Symposium (PIERS), Session 2P4, Shanghai, China, August 2016. Invited Paper
• Demonstration of 1,440x1,440 fast optical circuit switch for datacenter networking
  K. Ueda, Y. Mori, H. Hasegawa, H. Matsuura, K. Ishii, H. Kuwatsuka, S. Namiki, T. Watanabe, and K. Sato
  OptoElectronics and Communications Conference / International Conference on Photonics in Switching (OECC/PS), paper WF1-3, Nigata, Japan, July 2016. Best Paper Award
• Hardware scale analysis and prototype development of flexible waveband routing OXCs
  T. Ishikawa, M. Niwa, K. Ueda, Y. Mori, H. Hasegawa, S. Subramaniam, K. Sato, and O. Moriwaki
  OptoElectronics and Communications Conference / International Conference on Photonics in Switching (OECC/PS), paper TuA1-1, Nigata, Japan, July 2016.
• Spectral efficient grouped routing network that applies dynamic optical path grooming
  Y. Terada, Y. Mori, H. Hasegawa, and K. Sato
  OptoElectronics and Communications Conference / International Conference on Photonics in Switching (OECC/PS), paper TuA1-1, Nigata, Japan, July 2016.
• Polarization-independent C-band tunable filter based on cascaded Si-wire asymmetric Mach-Zehnder interferometer
  K. Suzuki, K. Tanizawa, S. Suda, H. Matsuura, K. Ikeda, Y. Mori, K. Sato, S. Namiki, and H. Kawashima
  OptoElectronics and Communications Conference / International Conference on Photonics in Switching (OECC/PS), paper ME1-2, Nigata, Japan, July 2016.
• Tipping point for the future scalable OXC -What size MxM WSS is needed?-
  M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper W4B.5, Anaheim, USA, March 2016. Top Rated Systems/Networking Paper and Journal Invitation
• Highly spectral efficient elastic optical network employing grouped optical path routing
  Y. Terada, Y. Mori, H. Hasegawa, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper W2A.48, Anaheim, USA, March 2016.
• Algorithm for raising OXC port count to meet traffic growth at minimum-cost
  K. Sato, Y. Mori, H. Hasegawa, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper W4B.2, Anaheim, USA, March 2016. Top Rated Systems/Networking Paper and Journal Invitation
• Spectrum utilization maximization in coarse granular optical routing networks that employ fine granular shared protection
  T. Ishikawa, Y. Mori, H. Hasegawa, and K. Sato
  International Conference on the Design of Reliable Communication Networks (DRCN), pp. 79-86, Paris, France, March 2016.
• Cycle-slip-tolerant decision-boundary creation with machine learning
  H. Kawase, Y. Mori, H. Hasegawa, and K. Sato
  IEEE International Conference on Photonics (ICP), paper Com-4, Sarawak, Malaysia, March 2016.
• Low-loss and large-scale optical switch utilizing asymmetric-port-count cyclic AWGs
  K. Ueda, Y. Mori, H. Hasegawa, K. Sato, and O. Moriwaki
  IEEE International Conference on Photonics (ICP), paper Dev-8, Sarawak, Malaysia, March 2016. Best Paper Award
• Demonstration of 720x720 optical fast circuit switch for intra-datacenter networks
  K. Ueda, Y. Mori, H. Hasegawa, K. Ishii, H. Kuwatsuka, S. Namiki, H. Matsuura, and K. Sato
  Proc. SPIE 9775, Next-Generation Optical Networks for Data Centers and Short-Reach Links III, 97750J, March 2016.
• Real-time optical path control method that utilizes multiple support vector machines for traffic prediction
  H. Kawase, Y. Mori, H. Hasegawa, and K. Sato
  Proc. SPIE 9773, Optical Metro Networks and Short-Haul Systems VIII, 97730I, February 2016.
• Architecture and design of optical path networks utilizing waveband virtual links
  Y. Ito, Y. Mori, H. Hasegawa, and K. Sato
  Proc. SPIE 9773, Optical Metro Networks and Short-Haul Systems VIII, 97730J, February 2016.

2015

• Shared protected grouped optical path routing network design employing iterative path group relocation
  T. Ishikawa, Y. Mori, H. Hasegawa, and K. Sato
  International Workshop on Reliable Networks Design and Modeling (RNDM), Munich, Germany, October 2015.
• Novel network control scheme that can substantially reduce link and node costs simultaneously
  Y. Terada, Y. Mori, H. Hasegawa, and K. Sato
  European Conference on Optical Communication (ECOC), paper We.4.5.5, Valencia, Spain, September 2015.
• Highly scalable and compact ROADM architecture that exploits MxN wavelength-selective switches
  M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
  International Conference on Photonics in Switching (PS), paper WeII3-2, Florence, Italy, September 2015.
• Large-scale optical switch with simplified sub-switch connections for datacenter application
  K. Ueda, Y. Mori, H. Hasegawa, and K. Sato
  International Conference on Photonics in Switching (PS), paper FrIII2-2, Florence, Italy, September 2015.
• Evaluation of frequency utilization enhancement with transmission-characteristics-aware grouped optical path routing
  Y. Terada, Y. Mori, H. Hasegawa, K. Sato, and T. Tanaka
  International Conference on Photonics in Switching (PS), paper SC4-2, Florence, Italy, September 2015.
• Impairment-aware optical multicast tree design with modulation format optimization
  S. Deb, H. Hasegawa, Y. Mori, and K. Sato
  International Conference on Photonics in Switching (PS), paper SC4-1, Florence, Italy, September 2015.
• Wavelength path signaling for WSS/WBSS combined optical switches in hierarchical optical networks
  T. Miyazawa, T. Hirayama, H. Harai, K. Ueda, Y. Mori, H. Hasegawa, and K. Sato
  International Conference on Transparent Optical Networks (ICTON), paper Tu.B3.5, Budapest, Hungary, July 2015.
• Experimental demonstration of multi-granular optical-path network utilizing wavelength/waveband-selective switches
  K. Ueda, M. Niwa, Y. Mori, H. Hasegawa, K. Sato, T. Miyazawa, and H. Harai
  OptoElectronics and Communications Conference (OECC), paper JThB.15, Shanghai, China, June/July 2015.
• Resilient grouped routing optical networks with finely granular protection
  H. Hasegawa, Y. Mori, and K. Sato
  International Conference on Optical Network Design and Modeling (ONDM), paper S7.3, Pisa, Italy, May 2015.
• Demonstration of large-port-count and compact ROADM that exhibits virtual-C/D/C performance
  S. Takashina, H. Ishida, Y. Mori, H. Hasegawa, K. Sato, and T. Watanabe
  OSA Optical Fiber Communication Conference (OFC), paper W3J.6, Los Angeles, USA, March 2015.
• Large-scale optical-switch prototype compactly implemented with novel functional configuration
  K. Ueda, Y. Mori, H. Hasegawa, K. Sato, and T. Watanabe
  OSA Optical Fiber Communication Conference (OFC), paper W3D.1, Los Angeles, USA, March 2015. Top-Scoring Paper
• Residual capacity aware dynamic control of GRE-based routing optical path networks under traffic growth model
  Y. Terada, Y. Mori, H. Hasegawa, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper Th1I.6, Los Angeles, USA, March 2015.
• Wavelength-tunable filter utilizing non-cyclic arrayed waveguide grating to create colorless/directionless/contentionless ROADMs
  M. Niwa, S. Takashina, Y. Mori, H. Hasegawa, K. Sato, and T. Watanabe
  Proc. SPIE 9388, Optical Metro Networks and Short-Haul Systems VII, 938807, February 2015.
• A novel optical path routing network that combines coarse granularity optical multicast with fine granularity add/drop and block
  M. M. Mauro, Y. Mori, H. Hasegawa, and K. Sato
  Proc. SPIE 9388, Optical Metro Networks and Short-Haul Systems VII, 93880O, February 2015.

2014

• Low-loss and low-power-consumption wavelength tunable filter enabling colorless/directionless/contentionless optical drop in ROADMs
  S. Takashina, Y. Mori, H. Hasegawa, K. Sato, and T. Watanabe
  European Conference on Optical Communication (ECOC), paper We.3.5.2, Cannes, France, September 2014.
• Verification of high frequency spectrum utilization in grouped optical path routing networks under traffic growth scenario
  Y. Teraeda, Y. Mori, H. Hasegawa, and K. Sato
  European Conference on Optical Communication (ECOC), paper Mo.3.1.4, Cannes, France, September 2014.
• Novel large-port-count optical-switch architecture for optical interconnection in datacenter
  K. Ueda, Y. Mori, H. Hasegawa, K. Sato, and T. Watanabe
  European Conference on Optical Communication (ECOC), paper We.3.5.1, Cannes, France, September 2014.
• Optimum power-budget allocation for large-scale optical switches utilizing cyclic arrayed waveguide gratings
  K. Ueda, Y. Mori, H. Hasegawa, and K. Sato
  International Conference on Photonics in Switching (PS), paper JT5B.3, San Diego, USA, July 2014.
• Low crosstalk wavelength tunable filter that utilizes symmetric and asymmetric Mach-Zehnder interferometers
  S. Takashina, Y. Mori, H. Hasegawa, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper Th3F.6, San Francisco, USA, March 2014.
• Estimation of OSNR for Nyquist-WDM transmission systems using statistical moments of equalized signals in digital coherent receivers
  Md. S. Faruk, Y. Mori, and K. Kikuchi
  OSA Optical Fiber Communication Conference (OFC), paper Th2A.29, San Francisco, USA, March 2014.
• Fiber-nonlinearity limitation of transmission distances in ultra-dense gridless photonic networks
  Y. Mori, H. Hasegawa, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper W2A.33, San Francisco, USA, March 2014.
• Enhancement of fiber frequency utilization by employing grouped optical path routing
  Y. Terada, Y. Mori, H. Hasegawa, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper W1C.6, San Francisco, USA, March 2014.
• A 204.8 Tbps throughput 64x64 optical cross-connect prototype that allows C/D/C add/drop
  K. Takaha, Y. Mori, H. Hasegawa, and K. Sato
  OSA Optical Fiber Communication Conference (OFC), paper M2K.1, San Francisco, USA, March 2014. Top-scoring Paper
• Photonic networks that exploit digital coherent technologies
  Y. Mori and K. Sato
  Proc. SPIE 9008, Optical Metro Networks and Short-Haul Systems VI, 900802, February 2014. Invited Paper

2013

• Novel polarization-diversity scheme based on mutual phase conjugation for fiber-nonlinearity mitigation in ultra-long coherent optical transmission systems
  H. Lu, Y. Mori, C. Han, and K. Kikuchi
  European Conference on Optical Communication (ECOC), paper We.3.C.3, London, United Kingdom, September 2013.
• Wavelength demultiplexing of Nyquist WDM signals under large frequency offsets in digital coherent receivers
  Y. Mori, C. Han, H. Lu, and K. Kikuchi
  European Conference on Optical Communication (ECOC), paper Mo.4.C.6, London, United Kingdom, September 2013.
• Dual-stage phase estimator enabling perfect frequency offset in digital coherent receivers
  Y. Mori and K. Kikuchi
  OSA Optical Fiber Communication Conference (OFC), paper OTu3I.7, Anaheim, USA, March 2013.

2012

• Kerr-effect compensation with parallel single split-steps in digital coherent receivers
  Y. Mori, C. Zhang, and K. Kikuchi
  OptoElectronics and Communications Conference (OECC), paper 5B1-2, Busan, Korea, July 2012.
• Novel FIR-filter configuration tolerant to fast phase fluctuations in digital coherent receivers for higher-order QAM signals
  Y. Mori, C. Zhang, and K. Kikuchi
  OSA Optical Fiber Communication Conference (OFC), paper OTH4C.4, Los Angeles, USA, March 2012.

2011

• Carrier-phase-insensitive operation of FIR filters adapted by the decision-directed LMS algorithm in digital coherent optical receivers
  Y. Mori and K. Kikuchi
  OptoElectronics and Communications Conference (OECC), paper 7B2_4, Kaohsiung, Taiwan, July 2011.
• Bit-error rate performance of Nyquist wavelength-division multiplexed quadrature phase-shift keying optical signals
  K. Igarashi, Y. Mori, K. Katoh, and K. Kikuchi
  OSA Optical Fiber Communication Conference (OFC), paper OMR6, Los Angeles, USA, March 2011.
• Second-order PMD monitoring from adaptive FIR-filter tap coefficients in a digital coherent receiver
  Md. S. Faruk, Y. Mori, C. Zhang, K. Katoh, and K. Kikuchi
  OSA Optical Fiber Communication Conference (OFC), paper OWN3, Los Angeles, USA, March 2011.

2010

• Ultrafast digital coherent receiver based on parallel processing of decomposed frequency subbands
  C. Zhang, Y. Mori, K. Igarashi, K. Katoh, and K. Kikuchi
  European Conference on Optical Communication (ECOC), paper Th.10.A.5, Turin, Italy, September 2010.
• Multi-impairments monitoring from the equalizer in a digital coherent optical receiver
  Md. S. Faruk, Y. Mori, C. Zhang, K. Katoh, and K. Kikuchi
  European Conference on Optical Communication (ECOC), paper Th.10.A.1, Turin, Italy, September 2010.
• Proper polarization demultiplexing in coherent optical receiver using constant modulus algorithm with training mode
  Md. S. Faruk, Y. Mori, C. Zhang, K. Katoh, and K. Kikuchi
  OptoElectronics and Communications Conference (OECC), paper 9B3-3, Sapporo, Japan, July 2010.

2009

• Straight-line 1,073-km transmission of 640-Gbit/s dual-polarization QPSK signals on a single carrier
  C. Zhang, Y. Mori, M. Usui, K. Igarashi, K. Katoh, and K. Kikuchi
  European Conference on Optical Communication (ECOC), post-deadline paper PD2.8, Vienna, Austria, September 2009. Post-deadline Paper
• Transmission of 160-Gbit/s QPSK signals on a single carrier over 1,000 km using digital coherent receivers
  C. Zhang, Y. Mori, M. Usui, K. Igarashi, K. Katoh, and K. Kikuchi
  European Conference on Optical Communication (ECOC), paper Th.10.3.6, Vienna, Austria, September 2009.
• 200-km transmission of 100-Gbit/s 32-QAM dual-polarization signals using a digital coherent receiver
  Y. Mori, C. Zhang, M. Usui, K. Igarashi, K. Katoh, and K. Kikuchi
  European Conference on Optical Communication (ECOC), paper We.8.4.6, Vienna, Austria, September 2009.
• Phase-noise tolerance of optical 16-QAM signals demodulated with decision-directed carrier-phase estimation
  Y. Mori, C. Zhang, K. Igarashi, K. Katoh, and K. Kikuchi
  OSA Optical Fiber Communication Conference (OFC), paper OWG7, San Diego, USA, March 2009.
• Demodulation of 1.28-Tbit/s polarization-multiplexed 16-QAM signals on a single carrier with digital coherent receiver
  C. Zhang, Y. Mori, K. Igarashi, K. Katoh, and K. Kikuchi
  OSA Optical Fiber Communication Conference (OFC), paper OTuG3, San Diego, USA, March 2009. Semi-finalist in the 2009 Corning Outstanding Student Paper Competition

2008

• Transmission of 40-Gbit/s 16-QAM signal over 100-km standard single-mode fiber using digital coherent optical receiver
  Y. Mori, C. Zhang, K. Igarashi, K. Katoh, and K. Kikuchi
  European Conference on Optical Communication (ECOC), paper Tu.1.E.4, Brussels, Belgium, September 2008.
• Demodulation of 480-Gbit/s 8PSK OTDM signal with digital coherent receiver
  C. Zhang, Y. Mori, K. Igarashi, K. Katoh, and K. Kikuchi
  European Conference on Optical Communication (ECOC), paper Mo.4.D.6. Brussels, Belgium, September 2008.
• Unrepeated 200-km transmission of 40-Gbit/s 16-QAM signals using digital coherent optical receiver
  Y. Mori, C. Zhang, K. Igarashi, K. Katoh, and K. Kikuchi
  Opto-Electronics and Communications Conference / the Australian Conference on Optical Fibre Technology (OECC/ACOFT), post-deadline paper PDP-4, Sydney, Australia, July 2008. Post-deadline Paper
• Decision-feedback carrier-phase estimation for digital coherent optical receivers
  Y. Mori, K. Igarashi, K. Katoh, and K. Kikuchi
  Opto-Electronics and Communications Conference / the Australian Conference on Optical Fibre Technology (OECC/ACOFT), paper WeF-4, Sydney, Australia, July 2008.
• Demodulation of 640-Gbit/s polarization-multiplexed OTDM QPSK signals using a digital coherent receiver
  C. Zhang, Y. Mori, K. Igarashi, and K. Kikuchi
  OSA Optical Fiber Communication Conference / National Fiber Optic Engineers Conference (OFC/NFOEC), post-deadline paper PDP6, San Diego, USA, February 2008. Post-deadline Paper
• Demodulation of 320-Gbit/s optical quadrature phase-shift keying signal with digital coherent receiver having time-division demultiplexing function
  K. Kikuchi, K. Igarashi, Y. Mori, and C. Zhang
  OSA Optical Fiber Communication Conference / National Fiber Optic Engineers Conference (OFC/NFOEC), paper OTuO4, San Diego, USA, February 2008.

Awards

2025

• Best Paper Award, Opto-Electronics and Communications Conference / Photonics in Switching and Computing (OECC/PSC) 2025
  T. Sekizuka, R. Higuchi, K. Satake, T. Kuno, Y. Mori, H. Hasegawa