Dual-stage decision-directed phase estimator enabling perfect frequency-offset elimination in digital coherent optical receivers. - Yojiro Mori; Kazuro Kikuchi (OFC/NFOEC, 2013)

Low-loss and Low-power-consumption wavelength tunable filter enabling colorless/directionless/contentionless optical drop in ROADMs. - Shoichi Takashina; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Toshio Watanabe (ECOC, 2014)

Verification of high frequency spectrum utilization in grouped optical path routing networks under traffic growth scenario. - Yuki Terada; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (ECOC, 2014)

Novel large-port-count optical-switch architecture for optical interconnection in datacenter. - Koh Ueda; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Toshio Watanabe (ECOC, 2014)

Estimation of OSNR for Nyquist-WDM transmission systems using statistical moments of equalized signals in digital coherent receivers. - Md. Saifuddin Faruk; Yojiro Mori; Kazuro Kikuchi (OFC, 2014)

Fiber-nonlinearity limitation of transmission distances in ultra-dense gridless photonic networks. - Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2014)

A 204.8 Tbps throughput 64×64 optical cross-connect prototype that allows C/D/C add/drop. - Kensuke Takaha; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Toshio Watanabe (OFC, 2014)

Low crosstalk wavelength tunable filter that utilizes symmetric and asymmetric Mach-Zehnder interferometers. - Shoichi Takashina; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Toshio Watanabe (OFC, 2014)

Enhancement of fiber frequency utilization by employing grouped optical path routing. - Yuki Terada; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2014)

Novel network control scheme that can substantially reduce link and node costs simultaneously. - Yuki Terada; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (ECOC, 2015)

Wavelength path signalling for WSS/WBSS combined optical switches in hierarchical optical networks. - Takaya Miyazawa; Takahiro Hirayama; Hiroaki Harai; Koh Ueda; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (ICTON, 2015)

Shared protected grouped optical path routing network design employing iterative path group relocation. - Tomohiro Ishikawa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (RNDM@WMNC, 2015)

Demonstration of large-port-count and compact ROADM that exhibits virtual-C/D/C performance. - Shoichi Takashina; Hiroto Ishida; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Toshio Watanabe (OFC, 2015)

Residual capacity aware dynamic control of GRE-based routing optical path networks under traffic growth model. - Yuki Terada; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2015)

Large-scale optical-switch prototype compactly implemented with novel functional configuration. - Koh Ueda; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Toshio Watanabe (OFC, 2015)

Resilient grouped routing optical networks with finely granular protection. - Hiroshi Hasegawa; Yojiro Mori; Ken-ichi Sato (ONDM, 2015)

Spectrum utilization maximization in coarse granular optical routing networks that employ fine granular shared protection. - Tomohiro Ishikawa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (DRCN, 2016)

Tipping point for the future scalable OXC - What size MxM WSS is needed? - Masaki Niwa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2016)

Highly spectral efficient elastic optical network employing grouped optical path routing. - Yuki Terada; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2016)

Survivable Grouped Routing Optical Networks with Dedicated Path Protection. - Hiroshi Hasegawa; Yojiro Mori; Ken-ichi Sato (IEICE Trans. Commun., 2016)

Dynamic Router Performance Control Utilizing Support Vector Machines for Energy Consumption Reduction. - Hiroshi Kawase; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (IEEE Trans. Netw. Serv. Manag., 2016)

First Demonstration of Subsystem-Modular Optical Crossconnect Using Single-Module 6×6 WSS. - Ryota Hashimoto; Shuhei Yamaoka; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Keita Yamaguchi; Kazunori Seno; Kenya Suzuki (ECOC, 2017)

Joint Pre-, Inline-, and Post-Compensation of Spectrum Narrowing Caused by Traversing Multiple Optical Nodes. - Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (ECOC, 2017)

Dynamic control of coarse/fine hybrid granular routing optical networks. - Yusaku Ito; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2017)

Optical tunable filter for gridless ROADM. - Masaki Niwa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2017)

Novel intra- and inter-datacenter converged network exploiting space- and wavelength-dimensional switches. - Koh Ueda; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2017)

Highly reliable large-scale optical cross-connect architecture utilizing M×M wavelength-selective switches. - Shuhei Yamakami; Masaki Niwa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2017)

Fast Optical Circuit Switch for Intra-Datacenter Networking. - Koh Ueda; Yojiro Mori; Hiroshi Hasegawa; Hiroyuki Matsuura; Kiyo Ishii; Haruhiko Kuwatsuka; Shu Namiki; Toshio Watanabe; Ken-ichi Sato (IEICE Trans. Commun., 2017)

Spectral Efficiency Maximization of Grouped Routing Optical Networks With Shared Protection. - Tomohiro Ishikawa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2017)

Tipping Point for the Future Scalable OXC: What Size M × M WSS Is Needed? - Masaki Niwa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2017)

Algorithm for Raising OXC Port Count to Meet Traffic Growth at Minimum Cost. - Kosuke Sato; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2017)

Fast Optical Circuit Switch Using Monolithically Integrated Silicon-Photonic Space Switch and Wavelength-Tuneable Filter. - Yojiro Mori; Mungun-Erdene Ganbold; Ryuta Shiraki; Keijiro Suzuki; Hiroyuki Matsuura; Hitoshi Kawashima; Shu Namiki; Kazuhiro Ikeda; Ken-ichi Sato (ECOC, 2018)

Novel Demodulation Framework Based on Quadrature Duo-Binary/Quaternary/Octernary Spectrum Shaping and MLSE for Mitigating Spectrum Narrowing Caused by Node Traversals. - Shuhei Yamaoka; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (ECOC, 2018)

Spectral utilization efficient coarse granular routing optical networks with resiliency against multiple failures. - Tomohiro Ishikawa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (ICIN, 2018)

Fragmentation-Minimized Transponder Upgrading Employing Channel Bandwidth Aligned Slot Allocation in Flexible Grid Optical Networks. - Hiroshi Hasegawa; Takuma Yasuda; Yojiro Mori; Ken-ichi Sato (OFC, 2018)

Spectrally Efficient and Highly Resilient Grouped Routing Network Enhanced with Optical Performance Monitoring. - Keisuke Kayano; Hiroshi Saito; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Shoichiro Oda; Setsuo Yoshida; Takeshi Hoshida (OFC, 2018)

Large-Scale Optical Circuit Switch Architecture for Intra-Datacenter Networking. - Yojiro Mori; Ken-ichi Sato (OFC, 2018)

Next-Generation ROADM Employing Bandwidth-Adaptive Silicon-Photonic Filters for Flexible Drop Operation. - Yojiro Mori; Koh Ueda; Keijiro Suzuki; Hiroyuki Matsuura; Ken Tanizawa; Kazuhiro Ikeda; Shu Namiki; Hitoshi Kawashiwa; Ken-ichi Sato (OFC, 2018)

A New Framework for Nation-Wide Networking in Future Datacenter-Traffic Centric Era. - Keisuke Kayano; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Fumikazu Inuzuka; Akira Hirano (PSC, 2018)

Architecture and Design of Quasi-Nyquist WDM Networks with Flexible Grid Granular Switching. - Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (PSC, 2018)

Design and Verification of Large-Scale Optical Circuit Switch Using ULCF AWGs for Datacenter Application. - H. Nagai; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2018)

Design of and Resiliency Enhancement in Coarse/Fine Hybrid Granular Routing Optical Networks Based on Iterative Path-Pair-Loop Inflation. - Keisuke Itakura; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (DRCN, 2019)

Dynamic Control of Transparent Optical Networks with Adaptive State-Value Assessment Enabled by Reinforcement Learning. - Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (ICTON, 2019)

Verification of High Performance and Wide Applicability of Seamlessly Expandable and Limitless OXC. - Ryota Hashimoto; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2019)

Demonstration of Quasi-Nyquist WDM Networks using Widely Deployed Wavelength-Selective Switches. - Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2019)

Feasibility Test of Large-Scale (1, 424×1, 424) Optical Circuit Switches Utilizing Commercially Available Tunable Lasers. - Eiji Honda; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OECC/PSC, 2019)

Evaluation of WSS Characteristics in Highly Dense WDM Networks. - Kazuya Okamura; Shuhei Yamaoka; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OECC/PSC, 2019)

Assessment of Node- and Link- Level Blocking and Creating Cost-Effective Networks in the Era of Large Bandwidth Services. - Shuhei Yamakami; Masaki Niwa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Fumikazu Inuzuka; Akira Hirano (IEICE Trans. Commun., 2019)

Demonstration of 4.3 Pbps Optical Circuit Switching for Intra-Datacentre Networks Based on Spatial Super-Channels. - Eiji Honda; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (ECOC, 2020)

Large-Scale and Fast Optical Circuit Switch for Coherent Detection Using Tunable Local Oscillators Formed with Wavelength Bank and Widely-Tunable Silicon Ring Filters. - Ryosuke Matsumoto; Ryotaro Konoike; Hiroyuki Matsuura; Keijiro Suzuki; Takashi Inoue; Yojiro Mori; Kazuhiro Ikeda; Shu Namiki; Ken-ichi Sato (ECOC, 2020)

Large-Scale Optical Switch Architectures for Intra-Datacentre Networks. - Yojiro Mori; Ken-ichi Sato (ECOC, 2020)

Joint Pre-emphasis and Partial-response Coding for Spectrum Narrowing Caused by Repeated Optical-node Traversal in Ultra-dense WDM Networks. - Kazuya Okamura; Yojiro Mori; Hiroshi Hasegawa (ECOC, 2020)

High-Throughput Optical Circuit Switch for Intra-Datacenter Networks Based on Spatial Super-Channels. - Eiji Honda; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2020)

Scalable and Fast Optical Circuit Switch Created with Silicon-Photonic Tunable-Filter-Based Local Oscillator Bank and Colorless Coherent Detection. - Ryosuke Matsumoto; Takashi Inoue; Ryotaro Konoike; Hiroyuki Matsuura; Keijiro Suzuki; Yojiro Mori; Kazuhiro Ikeda; Shu Namiki; Ken-ichi Sato (OFC, 2020)

Dynamically Controlled Flexible-Grid Networks Based on Semi-Flexible Spectrum Assignment and Network-State-Value Evaluation. - Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2020)

High-Throughput and High-Port-Count Optical Cross- Connents Using Flexible Waveband Routing. - Takuma Kuno; Yojiro Mori; Suresh Subramaniam 001; Masahiko Jinno; Hiroshi Hasegawa (ONDM, 2020)

Architecture and Design of Coarse/Fine Hybrid Granular Routing Optical Networks. - Yusaku Ito; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (IEICE Trans. Commun., 2020)

Assessment of Optical Node Architectures for Building Next Generation Large Bandwidth Networks. - Mungun-Erdene Ganbold; Takuma Yasuda; Yojiro Mori; Hiroshi Hasegawa; Fumikazu Inuzuka; Akira Hirano; Ken-ichi Sato (IEICE Trans. Commun., 2020)

Transmission-Quality-Aware Online Network Design and Provisioning Enabled by Optical Performance Monitoring. - Keisuke Kayano; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Shoichiro Oda; Setsuo Yoshida; Takeshi Hoshida (IEICE Trans. Commun., 2020)

Design of seamlessly and limitlessly expandable OXC and verification tests on its versatile applicability. - Ryota Hashimoto; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2020)

Experimental Evaluation of Optical Cross-Connects with Flexible Waveband Routing Function for SDM Networks. - Takuma Kuno; Yojiro Mori; Suresh Subramaniam 001; Masahiko Jinno; Hiroshi Hasegawa (OFC, 2021)

Design and Performance Evaluation of Resilient Optical Path Networks That Adopt Spatially-Jointed Flexible Waveband Routing. - Ryuji Munakata; Yojiro Mori; Suresh Subramaniam 001; Masahiko Jinno; Hiroshi Hasegawa (ONDM, 2021)

Fragmentation-Minimized Periodic Network-Bandwidth Expansion Employing Aligned Channel Slot Allocation in Flexible Grid Optical Networks. - Hiroshi Hasegawa; Takuma Yasuda; Yojiro Mori; Ken-ichi Sato (IEICE Trans. Commun., 2021)

High-port-count optical circuit switches for intra-datacenter networks [Invited Tutorial]. - Yojiro Mori; Ken-ichi Sato (JOCN, 2021)

Design and control of highly spectrally efficient photonic networks enabled by fiber-granular routing on overlaid ring-shaped topologies. - Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Paolo Monti 001 (JOCN, 2021)

Efficient Network Capacity Expansion by Differentiated WDM-Density with Bandwidth-Variable Virtual Direct Links. - Kazuki Hayashi; Yojiro Mori; Hiroshi Hasegawa (FNWF, 2022)

Demonstration of High-Throughput Intra-Datacenter Switches Using Interleaved AWGs for Nyquist WDM. - Takuma Kuno; Takumi Mitsuya; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2022)

Design and Dynamic Control of Fiber-Granular Routing Networks with Next-Generation Optical Paths. - Takeshi Matsuo; Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa (OFC, 2022)

Constellation-Shaped 64QAM Robust against Phase Noise in Intra-Datacenter Networks. - Jun Sakano; Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa (OECC/PSC, 2022)

Optical Performance Monitoring Using Adaptive FIR Filters for Constellation-Shaped Higher-Order QAM Signals. - Naoki Tsuchida; Takuma Kuno; Jun Sakano; Yojiro Mori; Hiroshi Hasegawa (OECC/PSC, 2022)

Spatially-Jointed Flexible Waveband Routing Optical Networks Adopting Shared Path Protection. - Ryuji Munakata; Yojiro Mori; Suresh Subramaniam 001; Masahiko Jinno; Hiroshi Hasegawa (RNDM, 2022)

Design and evaluation of a reconfigurable optical add-drop multiplexer with flexible wave-band routing in SDM networks. - Takuma Kuno; Yojiro Mori; Suresh Subramaniam 001; Masahiko Jinno; Hiroshi Hasegawa (JOCN, 2022)

Architecture and performance evaluation of fiber-granularity routing networks with supplemental grooming by wavelength conversion. - Takeshi Matsuo; Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa (JOCN, 2022)

Architecture and Performance Evaluation of Bundled-path-routing Multi-band Optical Networks. - Ryuji Munakata; Takuma Kuno; Yojiro Mori; Shih-Chun Lin 002; Motoharu Matsuura; Suresh Subramaniam 001; Hiroshi Hasegawa (OFC, 2023)

Cost-effective Network Capacity Enhancement with Multi-band Virtual Bypass Links. - Daisuke Saito; Yojiro Mori; Kohei Hosokawa; Shigeyuki Yanagimachi; Hiroshi Hasegawa (OFC, 2023)

Effective Capacity Estimation Based on Cut-Set Load Analysis in Optical Path Networks. - Kenji Cruzado; Yojiro Mori; Shih-Chun Lin 002; Motoharu Matsuura; Suresh Subramaniam 001; Hiroshi Hasegawa (PSC, 2023)

4.71-Pbps-Throughput Multiband OXC Based on Space- and Wavelength-Granular Hybrid Switching. - Takuma Kuno; Takuro Ochiai; Reiji Higuchi; Kazato Satake; Kenji Cruzado; Ryuji Munakata; Yojiro Mori; Shih-Chun Lin 002; Motoharu Matsuura; Suresh Subramaniam 001; Hiroshi Hasegawa (PSC, 2023)

Transceiver-Impairment Mitigation Enabled by Adaptive Symbol Decision with Neural Networks. - Takuro Ochiai; Reiji Higuchi; Takuma Kuno; Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa (PSC, 2023)

Cost-effective network capacity upgrade by heterogeneous wavelength division multiplexing density with bandwidth-variable virtual direct links. - Kazuki Hayashi; Yojiro Mori; Hiroshi Hasegawa (JOCN, 2023)

Capacity-Bound Evaluation and Routing and Spectrum Assignment for Elastic Optical Path Networks with Distance-Adaptive Modulation. - Kenji Cruzado; Yojiro Mori; Shih-Chun Lin 002; Motoharu Matsuura; Suresh Subramaniam 001; Hiroshi Hasegawa (OFC, 2024)

Intra-datacenter Optical Circuit Switch Architecture with Multi-band Transmission Technologies. - Takuma Kuno; Reiji Higuchi; Kazato Satake; Hayato Yuasa; Yojiro Mori; Hiroshi Hasegawa (OFC, 2024)

Cost-Effective Capacity Enhancement of Survivable Optical Networks by Supplemental Band Expansion and Backup Resource Sharing. - Daisuke Saito; Yojiro Mori; Kohei Hosokawa; Shigeyuki Yanagimachi; Hiroshi Hasegawa (OFC, 2024)

Demodulation Framework Based on Machine Learning for Unrepeated Transmission Systems. - Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa (IEICE Trans. Commun., 2024)

Deep-Depth Probability-Maintained Notch Sequences for PAM. - Jingnan Li; Tong Ye; Xiaofei Su; Yangyang Fan; Ke Zhang; Shiyu Shi; Hisao Nakashima; Takeshi Hoshida; Zhenning Tao; Yojiro Mori; Hiroshi Hasegawa (IEEE DataPort, 2024)

Demonstration of Multigranular-Routing Layered Network with Impairment-Aware Modulation Format Selection. - Hayato Yuasa; Takuma Kuno; Taisei Sekizuka; Yojiro Mori; Shih-Chun Lin 002; Motoharu Matsuura; Suresh Subramaniam 001; Wakako Maeda; Shigeyuki Yanagimachi; Hiroshi Hasegawa (OFC, 2025)