Field experiment of OSNR-aware adaptive optical transmission with pilot-aided bidirectional feedback channel. - Seiji Okamoto; Kazushige Yonenaga; Fukutaro Hamaoka; Yoshiaki Kisaka (OFC, 2016)

Experimental Demonstration of Simplified Adaptive Equalizer for Fractionally Sampled 120-GBaud Signal. - Fukutaro Hamaoka; Seiji Okamoto; Masanori Nakamura; Asuka Matsushita; Takayuki Kobayashi; Hiroshi Yamazaki; Munehiko Nagatani; Yoshiaki Kisaka; Akira Hirano; Yutaka Miyamoto (ECOC, 2017)

10-WDM 64-GBaud PDM-64QAM Transmission over all-Raman amplified 840 km SSMF using Digital Back Propagation. - Asuka Matsushita; Masanori Nakamura; Hideki Nishizawa; Yoshiaki Kisaka; Akira Hirano (ECOC, 2017)

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)

Adaptive Compensation for SOA-Induced Nonlinear Distortion with Training-Based Estimation of SOA Device Parameters. - Fukutaro Hamaoka; Seiji Okamoto; Masanori Nakamura; Asuka Matsushita; Yoshiaki Kisaka (ECOC, 2018)

Spectrally Efficient 800 Gbps/Carrier WDM Transmission with 100-GHz Spacing Using Probabilistically Shaped PDM-256QAM. - Masanori Nakamura; Asuka Matsushita; Seiji Okamoto; Fukutaro Hamaoka; Yoshiaki Kisaka (ECOC, 2018)

Single-carrier 48-GBaud PDM-256QAM Transmission Over Unrepeated 100km Pure-silica-core Fiber Using Commercially Available μITLA and LN-IQ-modulator. - Asuka Matsushita; Masanori Nakamura; Fukutaro Hamaoka; Yoshiaki Kisaka (OFC, 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)

Advanced DSP Technologies with Symbol-rate over 100-Gbaud for High-capacity Optical Transport Network. - Masanori Nakamura; Fukutaro Hamaoka; Asuka Matsushita; Hiroshi Yamazaki; Munehiko Nagatani; Takayuki Kobayashi; Yoshiaki Kisaka; Yutaka Miyamoto (OFC, 2018)

Laser Phase Noise Tolerance of Probabilistically-Shaped Constellations. - Seiji Okamoto; Fukutaro Hamaoka; Masanori Nakamura; Yoshiaki Kisaka (OFC, 2018)

255-Gbps PAM-8 Transmission under 20-GHz Bandwidth Limitation using NL-MLSE Based on Volterra Filter. - Akira Masuda; Shuto Yamamoto; Hiroki Taniguchi; Masanori Nakamura; Yoshiaki Kisaka (OFC, 2019)

64-GBd PDM-256QAM and 92-GBd PDM-64QAM Signal Generation using Precise-Digital-Calibration aided by Optical-Equalization. - Asuka Matsushita; Masanori Nakamura; Kengo Horikoshi; Seiji Okamoto; Fukutaro Hamaoka; Yoshiaki Kisaka (OFC, 2019)

Low Complexity Sub-Band Digital Back Propagation. - Seiji Okamoto; Kengo Horikoshi; Masanori Nakamura; Asuka Matsushita; Fukutaro Hamaoka; Yoshiaki Kisaka (OFC, 2019)

Experimental Analysis of Laser Phase Noise Tolerance of Uniform 256QAM and Probabilistically Shaped 1024QAM. - Takeo Sasai; Asuka Matsushita; Masanori Nakamura; Seiji Okamoto; Fukutaro Hamaoka; Yoshiaki Kisaka (OFC, 2019)

92-Gbaud PAM4 Transmission using Spectral-Shaping Trellis-Coded-Modulation with 20-GHz Bandwidth Limitation. - Shuto Yamamoto; Akira Masuda; Hiroki Taniguchi; Yoshiaki Kisaka (OFC, 2019)

Dual-Carrier 1-Tb/s Transmission Over Field-Deployed Large-Core Pure-Silica-Core Fiber Link Using Real-Time Transponder. - Fukutaro Hamaoka; Takeo Sasai; Kohei Saito; Takayuki Kobayashi; Asuka Matsushita; Masanori Nakamura; Hiroki Taniguchi; Shoichiro Kuwahara; Hiroki Kawahara; Takeshi Seki; Josuke Ozaki; Yoshihiro Ogiso; et al. (OECC/PSC, 2019)

Proposal and verification of auto calibration technique for bias control circuit connecting to imperfect IQ-modulator. - Hiroto Kawakami; Shoichiro Kuwahara; Yoshiaki Kisaka (OECC/PSC, 2019)

O-band Transmission of 255-Gb/s PAM8 Signal through 10-km SMF Using MLSE Based on Nonlinear Channel Estimation. - Shuto Yamamoto; Hiroki Taniguchi; Masanori Nakamura; Yoshiaki Kisaka (OECC/PSC, 2019)

Gain Instability in Forward-Pumped Raman Amplifier and Its Suppression Utilizing a Dual-Arm Depolarizer for Pump Light. - Hiroto Kawakami; Shoichiro Kuwahara; Yoshiaki Kisaka (ECOC, 2020)

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)

255-Gbps PAM-8 O-band Transmission through 10-km SMF under 14-GHz Bandwidth Limitation Using MLSE Based on Nonlinear Channel Estimation with Cutdown Volterra Kernels. - Hiroki Taniguchi; Shuto Yamamoto; Masanori Nakamura; Yoshiaki Kisaka (ECOC, 2020)

93-Gbaud PAM4 O-Band Transmission Using Nonlinear Spectral Shaping with Transition-Likelihood-Based Decoding. - Shuto Yamamoto; Hiroki Taniguchi; Masanori Nakamura; 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)

84-GBaud/λ PAM-4 Transmission over 20-km using 4-λ LAN-WDM TOSA and ROSA with MLSE Based on Nonlinear Channel Estimation. - Hiroki Taniguchi; Shuto Yamamoto; Yoshiaki Kisaka; Shigeru Kanazawa; Toshihide Yoshimatsu; Yozo Ishikawa; Kazuyo Mizuno (OFC, 2020)

O-Band 10-km Transmission of 93-Gbaud PAM4 Signal using Spectral Shaping Technique Based on Nonlinear Differential Coding with 1-Tap Precoding. - Shuto Yamamoto; Hiroki Taniguchi; Masanori Nakamura; Yoshiaki Kisaka (OFC, 2020)

Dual-Carrier 1-Tb/s Transmission Over Field-Deployed G.654.E Fiber Link Using Real-Time Transponder. - Fukutaro Hamaoka; Takeo Sasai; Kohei Saito; Takayuki Kobayashi; Asuka Matsushita; Masanori Nakamura; Hiroki Taniguchi; Shoichiro Kuwahara; Hiroki Kawahara; Takeshi Seki; Josuke Ozaki; Yoshihiro Ogiso; et al. (IEICE Trans. Commun., 2020)

Proposal and Verification of Auto Calibration Technique for Bias Control Circuit Connecting to Built-In Optical Power Monitor in Imperfect IQ-Modulator. - Hiroto Kawakami; Shoichiro Kuwahara; Yoshiaki Kisaka (IEICE Trans. Commun., 2020)

Low-complexity Channel Polarized Multilevel Coding for Modulation-format-independent Forward Error Correction. - Takeshi Kakizaki; Masanori Nakamura; Fukutaro Hamaoka; Yoshiaki Kisaka (ECOC, 2021)

800-Gbps PAM-4 O-band Transmission through 2-km SMF using 4λ LAN-WDM TOSA with MLSE Based on Nonlinear Channel Estimation and Decision Feedback. - Hiroki Taniguchi; Shuto Yamamoto; Yoshiaki Kisaka; Shigeru Kanazawa; Toshihide Yoshimatsu; Yozo Isikawa; Kazuyo Mizuno (ECOC, 2021)

O-Band 10-km PAM Transmission Using Nonlinear-Spectrum-Shaping Encoder and Transition-Likelihood-Based Decoder with Symbol- and Likelihood-Domain Feedbacks. - Shuto Yamamoto; Hiroki Taniguchi; Masanori Nakamura; Yoshiaki Kisaka (ECOC, 2021)

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)

Experimental Investigation of Influence of SOA-Induced Nonlinear Distortion on High-Symbol-Rate 168-GBaud Signal for Achieving Ultra-Broadband Optical Frontend. - Fukutaro Hamaoka; Masanori Nakamura; Takayuki Kobayashi; Munehiko Nagatani; Hitoshi Wakita; Hiroshi Yamazaki; Yoshihiro Ogiso; Yoshiaki Kisaka (OFC, 2022)

Low-complexity Channel-polarized Multilevel Coding for Probabilistic Amplitude Shaping. - Takeshi Kakizaki; Masanori Nakamura; Fukutaro Hamaoka; Yoshiaki Kisaka (OFC, 2022)

1.0-Tb/s/λ 3840-km and 1.2-Tb/s/λ 1280-km Transmissions with 168-GBaud PCS-QAM Signals Based on AMUX Integrated Frontend Module. - Masanori Nakamura; Takeo Sasai; Kohei Saito; Fukutaro Hamaoka; Takayuki Kobayashi; Hiroshi Yamazaki; Munehiko Nagatani; Yoshihiro Ogiso; Hitoshi Wakita; Yoshiaki Kisaka (OFC, 2022)

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)

800-Gbps PAM-4 2-km Transmission using 4-λ LAN-WDM TOSA with MLSE based on Deep Neural Network. - Hiroki Taniguchi; Shuto Yamamoto; Akira Masuda; Yoshiaki Kisaka; Shigeru Kanazawa (OFC, 2022)

112.8-Tb/s Real-Time Transmission over 101 km in 16.95-THz Triple-Band (S, C, and L Bands) WDM Configuration. - Fukutaro Hamaoka; Kohei Saito; Akira Masuda; Hiroki Taniguchi; Takeo Sasai; Masanori Nakamura; Takayuki Kobayashi; Yoshiaki Kisaka (OECC/PSC, 2022)

Dither-free Bias Condition Monitoring Technique Utilizing Reference Light for In- service Optical IQ modulator. - Hiroto Kawakami; Shoichiro Kuwahara; Yoshiaki Kisaka (OECC/PSC, 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)

256-Gbps PAM-4 O-band 10-km transmission with 1 sample/symbol under 18.5-GHz bandwidth limitation using NL-MLSE with Decision Feedback. - Hiroki Taniguchi; Shuto Yamamoto; Akira Masuda; Yoshiaki Kisaka (OECC/PSC, 2022)

NGMI and Kullback-Leibler Divergence in High-Baudrate PAM Transmission with Severe Bandwidth Limitation. - Shuto Yamamoto; Hiroki Taniguchi; Akira Masuda; 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)

Theoretical analysis of achievable rates for channel-polarized multilevel coding under binary-input AWGN channels. - Takeshi Kakizaki; Masanori Nakamura; Fukutaro Hamaoka; Yoshiaki Kisaka (ISIT, 2023)

173.7-Tb/s Triple-Band WDM Transmission using 124-Channel 144-GBaud Signals with SE of 9.33 b/s/Hz. - Fukutaro Hamaoka; Masanori Nakamura; Minami Takahashi; Takayuki Kobayashi; Yutaka Miyamoto; Yoshiaki Kisaka (OFC, 2023)

Performance Evaluation of Low-Complexity Channel-Polarized Multilevel Coded 146-Gbaud PDM Probabilistically Shaped 16QAM over 101-km Transmission. - Takeshi Kakizaki; Masanori Nakamura; Fukutaro Hamaoka; Yoshiaki Kisaka (OFC, 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)

128-Gbaud PAM4 O-Band Transmission Using Advanced MLSE with Simple LLR Calculation for SD-FEC Scheme. - Shuto Yamamoto; Hiroki Taniguchi; Akira Masuda; Masanori Nakamura; 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)

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)