2048 QAM (66 Gbit/s) single-carrier coherent optical transmission over 150 km with a potential SE of 15.3 bit/s/Hz. - Shohei Beppu; Keisuke Kasai; Masato Yoshida; Masataka Nakazawa (OFC, 2014)

256 QAM (polarization-multiplexed, 5 Gsymbol/s) coherent transmission with an injection-locked homodyne detection technique. - Keisuke Kasai; Shohei Beppu; Yixin Wang 011; Masataka Nakazawa (OFC, 2015)

56-Gbaud PAM4 Transmission over 2-km 125-μm-Cladding 4-Core Multicore Fibre for Data Centre Communications. - Shohei Beppu; Hidenori Takahashi; Tomohiro Gonda; Katsunori Imamura; Kengo Watanabe; Ryuichi Sugizaki; Takehiro Tsuritani (ECOC, 2017)

257-Tbit/s Partial MIMO-based 10-Mode C+L-band WDM Transmission over 48-km FMF. - Daiki Soma; Shohei Beppu; Yuta Wakayama; Yu Kawaguchi; Koji Igarashi; Takehiro Tsuritani (ECOC, 2017)

10.16 Peta-bit/s Dense SDM/WDM transmission over Low-DMD 6-Mode 19-Core Fibre Across C+L Band. - Daiki Soma; Yuta Wakayama; Shohei Beppu; Seiya Sumita; Takehiro Tsuritani; Tetsuya Hayashi; Takuji Nagashima; Masato Suzuki; Hidenori Takahashi; Koji Igarashi; Itsuro Morita; Masatoshi Suzuki (ECOC, 2017)

SDN Control and Monitoring System for Soft-Failure Detection and Optical Restoration of Spectral/Spatial Superchannels. - Raul Muñoz 001; Noboru Yoshikane; Josep M. Fabrega; Ricard Vilalta; Laura Rodriguez; Michela Svaluto Moreolo; Ramon Casellas; Ricardo Martínez 001; Shohei Beppu; Daiki Soma; Takehiro Tsuritani; Itsuro Morita (ECOC, 2018)

Long-Haul MCF Transmission Using Full C+L-Band 19-Core Cladding-Pumped EDFA. - Daiki Soma; Shohei Beppu; Koichi Maeda; Shigehiro Takasaka; Ryuichi Sugizaki; Hidenori Takahashi; Takehiro Tsuritani (ECOC, 2018)

SDN-enabled Sliceable Multi-dimensional (Spectral and Spatial) Transceiver Controlled with YANG/NETCONF. - Raul Muñoz 001; Noboru Yoshikane; Ramon Casellas; Josep M. Fabrega; Ricard Vilalta; Michela Svaluto Moreolo; Laia Nadal; Ricardo Martínez 001; Daiki Soma; Yuta Wakayama; Shohei Beppu; Seiya Sumita; et al. (OFC, 2018)

266.1-Tbit/s Repeatered Transmission over 90.4-km 6-Mode Fiber Using Dual C+L-Band 6-Mode EDFA. - Yuta Wakayama; Daiki Soma; Shohei Beppu; Seiya Sumita; Koji Igarashi; Takehiro Tsuritani (OFC, 2018)

Mode-Dependent Probabilistic Shaping for Highly-Efficient Weakly Coupled 10-Mode Fiber Transmission. - Shohei Beppu; Daiki Soma; Yuta Wakayama; Seiya Sumita; Koji Igarashi; Hidenori Takahashi; Takehiro Tsuritani (OFC, 2019)

SDN-Enabled Scaling Up/Down of SDM Super-Channels Exploiting Spatial Modes with Adaptive MIMO Equalization and Modulation Format Assignment. - Raul Muñoz 001; Noboru Yoshikane; Josep M. Fabrega; Laura Rodriguez; Ricard Vilalta; Daiki Soma; Shohei Beppu; Seiya Sumita; Ramon Casellas; Ricardo Martínez 001; Takehiro Tsuritani; Itsuro Morita (OFC, 2019)

Real-Time DSP for Adaptive FIR Filters Based on LMS Algorithm. - Masahiro Kikuta; Shohei Beppu; Tomoyuki Nagai; Yasuo Saito; Takehiro Tsuritani; Koji Igarashi (OECC/PSC, 2019)

Pattern Switching on Probabilistic Amplitude Shaping for achieving the highest SE in the whole SNR regions. - Gan Srirutchataboon; Shohei Beppu; Rachata Maneekut; Hidenori Takahashi; Takehiro Tsuritani (OECC/PSC, 2019)

Dynamic complex deep Neural Network Nonlinear Equalizer for 64 QAM Long-haul Transmission Systems. - Govind Sharan Yadav; Takehiro Tsuritani; Shohei Beppu; Hidenori Takahashi; Itsuro Morita; Kai-Ming Feng; Jhih-Heng Yan (OECC/PSC, 2019)

SDN Control of Sliceable Multidimensional (Spectral and Spatial) Transceivers with YANG/NETCONF. - Raúl Muñoz 001; Noboru Yoshikane; Ricard Vilalta; Josep M. Fàbrega; Laura Rodriguez; Ramon Casellas; Michela Svaluto Moreolo; Ricardo Martínez 001; Laia Nadal; Daiki Soma; Yuta Wakayama; Shohei Beppu; et al. (JOCN, 2019)

Experimental Verification on Digital Back Propagation Gain in MCF transmission over 6020-km Uncoupled and Coupled 4-Core Fibres. - Shohei Beppu; Daiki Soma; Hidenori Takahashi; Noboru Yoshikane; Itsuro Morita; Takehiro Tsuritani (ECOC, 2020)

Performance Comparison for Standard Cladding Ultra-Low-Loss Uncoupled and Coupled 4-Core Fibre Transmission over 15, 000 km. - Daiki Soma; Shohei Beppu; Hidenori Takahashi; Noboru Yoshikane; Itsuro Morita; Takehiro Tsuritani (ECOC, 2020)

Real-Time Strongly-Coupled 4-Core Fiber Transmission. - Shohei Beppu; Koji Igarashi; Hiroshi Mukai; Masahiro Kikuta; Masahiro Shigihara; Daiki Soma; Takehiro Tsuritani; Itsuro Morita (OFC, 2020)

Adaptive software defined networking control of space division multiplexing super-channels exploiting the spatial-mode dimension. - Raúl Muñoz 001; Noboru Yoshikane; Ricard Vilalta; Josep M. Fàbrega; Laura Rodriguez; Daiki Soma; Shohei Beppu; Seiya Sumita; Ramon Casellas; Ricardo Martínez 001; Takehiro Tsuritani; Itsuro Morita (JOCN, 2020)

Mode-multiplexed 16QAM transmission over 60-km coupled four-core fibres using real-time MIMO-DSP with high-accuracy frequency offset estimation. - Shohei Beppu; Masahiro Kikuta; Koji Igarashi; Hiroshi Mukai; Masahiro Shigihara; Yasuo Saito; Daiki Soma; Hidenori Takahashi; Noboru Yoshikane; Takehiro Tsuritani (ECOC, 2021)

Demonstration of Hybrid Probabilistic Geometric Shaping 64QAM Optical Fiber Transmission Using Optimized Constellation for MAP Detection with Hard Decision Decoding. - Rachata Maneekut; Daniel J. Elson; Yuta Wakayama; Shohei Beppu; Hidenori Takahashi; Noboru Yoshikane; Takehiro Tsuritani (ICACT, 2021)

Real-time MIMO-DSP Technologies for SDM Systems. - Shohei Beppu; Koji Igarashi; Masahiro Kikuta; Hiroshi Mukai; Masahiro Shigihara; Yasuo Saito; Daiki Soma; Hidenori Takahashi; Noboru Yoshikane; Itsuro Morita; Takehiro Tsuritani (OFC, 2021)

Real-time Transoceanic Coupled 4-core Fiber Transmission. - Shohei Beppu; Masahiro Kikuta; Koji Igarashi; Hiroshi Mukai; Masahiro Shigihara; Yasuo Saito; Daiki Soma; Hidenori Takahashi; Noboru Yoshikane; Itsuro Morita; Masatoshi Suzuki; Takehiro Tsuritani (OFC, 2021)

A Generalized Pairwise Optimization Accelerator Unit For Designing Geometric Shaping 64-QAM. - Rachata Maneekut; Daniel J. Elson; Shohei Beppu; Hidenori Takahashi; Noboru Yoshikane (OFC, 2021)

50.47-Tbit/s Standard Cladding Ultra-Low-Loss Coupled 4-Core Fiber Transmission over 9, 150 km. - Daiki Soma; Shohei Beppu; Yuta Wakayama; Seiya Sumita; Hidenori Takahashi; Noboru Yoshikane; Itsuro Morita; Takehiro Tsuritani; Masatoshi Suzuki (OFC, 2021)

Transmission of 400GBASE-LR8 Over 15 km Deployed Step-Index 4-Core fiber for Data Centre Interconnects. - Daniel J. Elson; Yuta Wakayama; Shohei Beppu; Daiki Soma; Noboru Yoshikane (OFC, 2022)

High-Capacity Mode Division Multiplexing Transmission Technology. - Daiki Soma; Shohei Beppu; Noboru Yoshikane; Takehiro Tsuritani (OFC, 2022)

Fiber Nonlinearity Equalization with a Quantum-Enhanced Support Vector Machine. - Shohei Beppu; Kazuhiro Saito; Noboru Yoshikane; Takehiro Tsuritani (OECC/PSC, 2022)

Transoceanic MIMO transmission with coupled-core multicore fibers. - Shohei Beppu; Daiki Soma; Noboru Yoshikane; Takehiro Tsuritani (OECC/PSC, 2022)

First Demonstration of Hierarchical SDM/WDM 10-Mode-Fiber Ring Network with Spatial Bypass and Reconfigurable Spatial Add/Drop Multiplexing. - Takahiro Kodama; Shohei Beppu; Daiki Soma; Yuta Wakayama; Noboru Yoshikane; Masahiko Jinno; Takehiro Tsuritani (OECC/PSC, 2022)

Experiment of Nationwide Multi-Route Skew Cancelling for Dynamic Mapping of MAC Signals over SDM/WDM Network Testbed. - Masaki Murakami; Yoshihiko Uematsu; Satoru Okamoto; Naoaki Yamanaka; Daiki Soma; Shohei Beppu; Noboru Yoshikane; Takehiro Tsuritani; Takahiro Kodama; Masahiko Jinno (OECC/PSC, 2022)

Concrete Quantum Circuits to Prepare Generalized Dicke States on a Quantum Machine. - Shintaro Narisada; Shohei Beppu; Kazuhide Fukushima; Shinsaku Kiyomoto (ICISSP, 2023)

High-Capacity and Ultra-Long-Haul Transmission over Transoceanic Distances Using Coupled and Uncoupled 4-Core Fibers with Standard Cladding Diameter. - Masatoshi Suzuki; Daiki Soma; Shohei Beppu; Yuta Wakayama; Noboru Yoshikane; Takehiro Tsuritani (ICTON, 2023)

Dynamic bypass of wavelength switching in SDN-enabled WDM VNTs over SDM Networks with high bit-rate optical channels. - Raul Muñoz 001; Carlos Manso; Filippos Balasis; Daiki Soma; Shohei Beppu; Ramon Casellas; Lluis Gifre; Ricard Vilalta; Ricardo Martínez 001; Noboru Yoshikane; Takehiro Tsuritani (OFC, 2023)

Real-time 6-Mode 19-Core Fiber Transmission. - Shohei Beppu; Masahiro Kikuta; Daiki Soma; Yoichi Yaegashi; Koji Igarashi; Masahiro Shigihara; Kazuhiko Aizawa; Noboru Yoshikane; Takehiro Tsuritani (OFC, 2023)

114 Pbit/s∙km Transmission using Three Vendor-Installed 60-km Standard Cladding Multi-Core Fiber Spans with Multiple Fusion Splicing. - Daiki Soma; Shohei Beppu; Yuichi Miyagawa; Noboru Yoshikane; Takehiro Tsuritani (OFC, 2023)

Continuous 16.4-THz Bandwidth Coherent DWDM Transmission in O-band using a Single Fibre Amplifier System. - Daniel J. Elson; Vitaly Mikhailov; Jiawei Luo; Shohei Beppu; Glenn W. Baxter; Ralf Stolte; Luke Stewart; Shigehiro Takasaka; Mindaugas Jarmolovicius; Eric Sillekens; Robert I. Killey; Polina Bayvel; et al. (OFC, 2024)

U-band WDM Transmission over 90-km Deployed Fiberoptic Cable Leveraged by S+C+L-band WDM Channels. - Tomoyuki Kato; Shohei Beppu; Daiki Soma; Hidenobu Muranaka; Shun Okada; Hiroyuki Irie; Yuta Wakayama; Noboru Yoshikane; Takehiro Tsuritani; Yu Tanaka; Takeshi Hoshida (OFC, 2024)

18,090-km 2-core Fiber Transmission Using Circulatory Directional Fan-in/Fan-out Devices. - Daiki Soma; Shohei Beppu; Lídia Galdino; Michael Lorenz; Qiulin Ma; Katsuhiro Iwasaki; Seiya Sumita; Kosuke Komatsu; Daniel J. Elson; Tomoaki Kiriyama; Katsuya Kito; Keito Kitamura; et al. (OFC, 2024)

U-Band Transmission Characteristics over Standard Cladding Step-Index 4-Core Fiber Span. - Daiki Soma; Tomoyuki Kato; Shohei Beppu; Daniel J. Elson; Hidenobu Muranaka; Hiroyuki Irie; Shun Okada; Yu Tanaka; Yuta Wakayama; Noboru Yoshikane; Takeshi Hoshida; Takehiro Tsuritani (OFC, 2024)

New GAWBS Noise Interacting with Longitudinally Propagating Acoustic Waves in Few-mode Fibers. - Masato Yoshida; Takaaki Hirai; Shohei Beppu; Keisuke Kasai; Toshihiko Hirooka; Masataka Nakazawa; Yuta Wakayama; Noboru Yoshikane (OFC, 2024)

Modoru: Clos nanosecond optical switching for distributed deep training [Invited]. - Cen Wang; Noboru Yoshikane; Daniel J. Elson; Yuta Wakayama; Daiki Soma; Shohei Beppu; Takehiro Tsuritani (J. Opt. Commun. Netw., 2024)

Security Analysis of Biased Basis for Efficient BB84. - Hiroki Yamamuro; Shohei Beppu; Kazuhide Fukushima; Shinsaku Kiyomoto (ICISSP (2), 2025)

Coexistence Transmission of 33.4-Tb/s O-band Coherent Classical Channels and a C-band QKD Channel over 80 km. - Shohei Beppu; Daniel J. Elson; Shinya Murai; Akira Murakami; Hiroki Yamamuro; Yuta Wakayama; Noboru Yoshikane; Takehiro Tsuritani (OFC, 2025)

Core-level Routing in Long-haul MCF Transmission System with FIFO-less Multicore EDFA and Spatial Cross-connect. - Kosuke Komatsu; Shohei Beppu; Daiki Soma; Yuta Wakayama; Noboru Yoshikane; Masahiko Jinno; Takehiro Tsuritani (OFC, 2025)

Demonstration of 4-Core/16-Core Fiber Heterogeneous Spatial Channel Network Comprising 19-Core Fiber Core Selective Switch-Based Spatial Gateway, 4-Core EDFAs, and 19-Core EDFAs. - Takumi Tani; Daiki Soma; Ryohei Otowa; Yusuke Matsuno; Kyosuke Nakada; Kosuke Komatsu; Yuji Hotta; Tsubasa Sasaki; Rika Tahara; Shohei Beppu; Koichi Maeda; Takuma Izumi; et al. (OFC, 2025)

Localising State-of-Polarisation Perturbation on a Repeatered Link Using Wavelength Dispersion Delay Walk-Off. - Kristina Skarvang Vaskinn; Daniel J. Elson; Shohei Beppu; Daiki Soma; Steinar Bjørnstad; Dag Roar Hjelme; Yuta Wakayama (OFC, 2025)

High-isolation and Low-crosstalk Optical-circulator-based 2-core Fan-out Device. - Yuta Wakayama; Asumi Kaya; Ikuya Saji; Shohei Beppu; Kosuke Komatsu; Daiki Soma; Taketoshi Takahata; Tetsuya Kobayashi; Lídia Galdino; Kevin Bennett; Sergejs Makovejs; Noboru Yoshikane; et al. (OFC, 2025)