100-Gb/s optical transport network and beyond employing digital signal processing. - Etsushi Yamazaki; Masahito Tomizawa; Yutaka Miyamoto (IEEE Commun. Mag., 2012)

Power efficient DSP implementation for 100G-and-beyond multi-haul coherent fiber-optic communications. - Osamu Ishida; Kazuhito Takei; Etsushi Yamazaki (OFC, 2016)

150.3-Tb/s Ultra-Wideband (S, C, and L Bands) Single-Mode Fibre Transmission over 40-km Using >519Gb/s/A PDM-128QAM Signals. - Fukutaro Hamaoka; Kyo Minoguchi; Takeo Sasai; Asuka Matsushita; Masanori Nakamura; Seiji Okamoto; Etsushi Yamazaki; Yoshiaki Kisaka (ECOC, 2018)

Experiments on Stimulated Raman Scattering in S- and L-bands 16-QAM Signals for Ultra-Wideband Coherent WDM Systems. - Kyo Minoguchi; Seiji Okamoto; Fukutaro Hamaoka; A. Matsushita; Masanori Nakamura; Etsushi Yamazaki; Yoshiaki Kisaka (OFC, 2018)

Low Noise Non-Linear Equalization Using Neural Networks and Belief Propagation. - Etsushi Yamazaki; Nariman Farsad; Andrea Goldsmith (CoRR, 2019)

Digital Backpropagation for Optical Path Monitoring: Loss Profile and Passband Narrowing Estimation. - Takeo Sasai; Masanori Nakamura; Etsushi Yamazaki; Shuto Yamamoto; Hideki Nishizawa; Yoshiaki Kisaka (ECOC, 2020)

Simultaneous Detection of Anomaly Points and Fiber Types in Multi-Span Transmission Links Only by Receiver-Side Digital Signal Processing. - Takeo Sasai; Masanori Nakamura; Seiji Okamoto; Fukutaro Hamaoka; Shuto Yamamoto; Etsushi Yamazaki; Asuka Matsushita; Hideki Nishizawa; Yoshiaki Kisaka (OFC, 2020)

Revealing Raman-amplified Power Profile and Raman Gain Spectra with Digital Backpropagation. - Takeo Sasai; Masanori Nakamura; Takayuki Kobayashi; Hiroto Kawakami; Etsushi Yamazaki; Yoshiaki Kisaka (OFC, 2021)

Impact of Local Oscillator Phase Noise on Long-Haul Transmission of 120-Gbaud Digital Sub-Carrier Signals. - Kohei Saito; Masanori Nakamura; Takeo Sasai; Takeshi Kakizaki; Fukutaro Hamaoka; Takayuki Kobayashi; Etsushi Yamazaki; Yoshiaki Kisaka (OFC, 2022)

Precise Longitudinal Power Monitoring over 2, 080 km Enabled by Step Size Selection of Split Step Fourier Method. - Takeo Sasai; Masanori Nakamura; Etsushi Yamazaki; Yoshiaki Kisaka (OFC, 2022)

Proposal of Linear Least Squares for Fiber-Nonlinearity-Based Longitudinal Power Monitoring in Multi-Span Link. - Takeo Sasai; Etsushi Yamazaki; Masanori Nakamura; Yoshiaki Kisaka (OECC/PSC, 2022)

Dither-free Auto Bias Control Technique for In-service Optical IQ modulator Using Reference Pulsed Light. - Hiroto Kawakami; Yoshiaki Kisaka; Etsushi Yamazaki (APCC, 2023)

0.77-dB Anomaly Loss Localization Based on DSP-Based Fiber-Longitudinal Power Estimation Using Linear Least Squares. - Takeo Sasai; Masanori Nakamura; Etsushi Yamazaki; Hideki Nishizawa; Yoshiaki Kisaka (OFC, 2023)

S+C+L WDM Coherent Transmission with >1-Tb/s/λ Signals. - Fukutaro Hamaoka; Masanori Nakamura; Takayuki Kobayashi; Yutaka Miyamoto; Etsushi Yamazaki; Yoshiaki Kisaka (OFC, 2024)

110.7-Tb/s Single-Mode-Fiber Transmission over 1040 km with High-Symbol-Rate 144-GBaud PDM-PCS-QAM Signals. - Fukutaro Hamaoka; Masanori Nakamura; Takeo Sasai; Shuto Sugawara; Takayuki Kobayashi; Yutaka Miyamoto; Etsushi Yamazaki (OFC, 2024)

Low-Complexity SD-FEC based on Channel-Polarized Multistage Codes for Data Center Networks. - Takeshi Kakizaki; Masanori Nakamura; Fukutaro Hamaoka; Seiji Okamoto; Etsushi Yamazaki (OFC, 2024)

Fiber Longitudinal Monitoring of Inter-band-SRS-induced Power Transition in S+C+L WDM Transmission. - Runa Kaneko; Takeo Sasai; Fukutaro Hamaoka; Masanori Nakamura; Etsushi Yamazaki (OFC, 2024)

4D Optical Link Tomography: First Field Demonstration of Autonomous Transponder Capable of Distance, Time, Frequency, and Polarization Resolved Monitoring. - Takeo Sasai; Giacomo Borraccini; Yue-Kai Huang; Hideki Nishizawa; Zehao Wang; Tingjun Chen; Yoshiaki Sone; Tatsuya Matsumura; Masanori Nakamura; Etsushi Yamazaki; Yoshiaki Kisaka (OFC, 2024)

Recent Advances in Digital Longitudinal Monitoring of Fiber-Optic Link. - Takeo Sasai; Minami Takahashi; Runa Kaneko; Yoshiaki Sone; Masanori Nakamura; Etsushi Yamazaki (OFC, 2024)

4-lambda LAN-WDM 1.6-Tb/s 2-km Transmission with Nonlinear Maximum Likelihood Sequence Estimation. - Hiroki Taniguchi; Masanori Nakamura; Fukutaro Hamaoka; Shuto Yamamoto; Yutaka Miyamoto; Etsushi Yamazaki (OFC, 2024)

Advanced MLSE with Simple Soft Output Achieving High NGMI for SD-FEC in IM-DD Transmission with Severe Bandwidth Limitation. - Shuto Yamamoto; Hiroki Taniguchi; Masanori Nakamura; Akira Masuda; Etsushi Yamazaki (OFC, 2024)

Optimization of iterative Chase soft decoder based on cross entropy minimization. - Etsushi Yamazaki; Shinya Sugiura (OFC, 2024)

Net 107.7-Tb/s Triple-Band WDM Transmission Over 1200-km Single-Mode Fiber With Forward- and Backward-Pumped Distributed Raman Amplifiers. - Fukutaro Hamaoka; Kosuke Kimura; Masanori Nakamura; Takeo Sasai; Takayuki Kobayashi; Yutaka Miyamoto; Etsushi Yamazaki (OFC, 2025)

DM-structure-aided Low-complexity Soft-decision Decoder for Improving Performance-complexity Tradeoffs in Short-block Length Codes. - Takeshi Kakizaki; Shuto Yamamoto; Masanori Nakamura; Etsushi Yamazaki (OFC, 2025)

Visualizing Longitudinal Evolution of Forward- and Backward-Raman-Amplified Power and Gain. - Runa Kaneko; Takeo Sasai; Masanori Nakamura; Fukutaro Hamaoka; Etsushi Yamazaki (OFC, 2025)

628 Gb/s Net Bitrate IMDD Transmission Using Ultra-broadband InP-DHBT-based Electrical Mixer with Upper-sideband Gain-enhanced Mode. - Masanori Nakamura; Teruo Jyo; Munehiko Nagatani; Hitoshi Wakita; Miwa Mutoh; Yuta Shiratori; Hiroki Taniguchi; Shuto Yamamoto; Fukutaro Hamaoka; Etsushi Yamazaki; Takayuki Kobayashi; Hiroyuki Takahashi; et al. (OFC, 2025)

SNR of Fiber-Longitudinal Power Monitor. - Takeo Sasai; Etsushi Yamazaki; Sze Yun Set; Shinji Yamashita (OFC, 2025)

200-Gbaud PAM4 O-Band Transmission Using Advanced MLSE with Simple-Soft-Output Scheme and Turbo Product Codes. - Shuto Yamamoto; Hiroki Taniguchi; Masanori Nakamura; Etsushi Yamazaki (OFC, 2025)