Super high density multi-carrier transmission system by MIMO processing. - Fukutaro Hamaoka; Kohei Saito; Toshiya Matsuda; Akira Naka (ECOC, 2014)

Evaluation of maximum ratio combining in route diversity transmission and application to hitless optical path switching in field installed fibre. - Kohei Saito; Masahiro Yokota; Fukutaro Hamaoka; Shuto Yamamoto; Takashi Kotanigawa; Hideki Maeda; Akira Naka (ECOC, 2015)

Mode and polarization division multiplexed signal detection with single coherent receiver using mode-selective coherent detection technique. - Fukutaro Hamaoka; Seiji Okamoto; Kengo Horikoshi; Kazushige Yonenaga; Akira Hirano; Yutaka Miyamoto (OFC, 2016)

Field trial of simultaneous 100-Gbps and 400-Gbps transmission using advanced digital coherent technologies. - Hideki Maeda; Takashi Kotanigawa; Kohei Saito; Masahiro Yokota; Shuto Yamamoto; Fukutaro Hamaoka; Mitsuteru Yoshida; Masahiro Suzuki; Takeshi Seki (OFC, 2016)

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)

High Baud Rate Signal Transmission with Coded Multi-dimensional Modulation. - Masanori Nakamura; Fukutaro Hamaoka; Asuka Matsushita; Hiroshi Yamazaki; Munehiko Nagatani; Akira Hirano; Yutaka Miyamoto (ECOC, 2017)

Ultra-Wideband Digital-to-Analog Conversion Technologies for Tbit/s channel transmission. - Hiroshi Yamazaki; Munehiko Nagatani; Fukutaro Hamaoka; Shigeru Kanazawa; Hideyuki Nosaka; Toshikazu Hashimoto; Yutaka Miyamoto (ECOC, 2017)

1-Pb/s (32 SDM/46 WDM/768 Gb/s) C-band dense SDM transmission over 205.6-km of single-mode heterogeneous multi-core fiber using 96-Gbaud PDM-16QAM channels. - Takayuki Kobayashi; Masanori Nakamura; Fukutaro Hamaoka; Kohki Shibahara; Takayuki Mizuno; Akihide Sano; H. Kawakami; Akira Isoda; Munehiko Nagatani; Hiroshi Yamazaki; Yutaka Miyamoto; Yoshimichi Amma; et al. (OFC, 2017)

120-GBaud coded 8 dimensional 16QAM WDM transmission using low-complexity iterative decoding based on bit-wise log likelihood ratio. - Masanori Nakamura; Fukutaro Hamaoka; Asuka Matsushita; Hiroshi Yamazaki; Munehiko Nagatani; Akihide Sano; Akira Hirano; Yutaka Miyamoto (OFC, 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)

Transmission Technologies Beyond 400-Gbps/Carrier Employing High-Order Modulation Formats. - Asuka Matsushita; Masanori Nakamura; Fukutaro Hamaoka; Seiji Okamoto (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)

A 110-GHz-Bandwidth 2: 1 AMUX-Driver using 250-nm InP DHBTs for Beyond-1-Tb/s/carrier Optical Transmission Systems. - Munehiko Nagatani; Yutaka Miyamoto; Hideyuki Nosaka; Hitoshi Wakita; Yoshihiro Ogiso; Hiroshi Yamazaki; Miwa Mutoh; Minoru Ida; Fukutaro Hamaoka; Masanori Nakamura; Takayuki Kobayashi (BCICTS, 2019)

120-GBaud 32QAM Signal Generation using Ultra-Broadband Electrical Bandwidth Doubler. - Fukutaro Hamaoka; Masanori Nakamura; Munehiko Nagatani; Takayuki Kobayashi; Asuka Matsushita; Hitoshi Wakita; Hiroshi Yamazaki; Hideyuki Nosaka; Yutaka Miyamoto (OFC, 2019)

35-Tb/s C-Band Transmission Over 800 km Employing 1-Tb/s PS-64QAM Signals Enhanced by Complex 8 × 2 MIMO Equalizer. - Takayuki Kobayashi; Masanori Nakamura; Fukutaro Hamaoka; Munehiko Nagatani; Hitoshi Wakita; Hiroshi Yamazaki; Takeshi Umeki; Hideyuki Nosaka; Yutaka Miyamoto (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)

192-Gbaud Signal Generation using Ultra-Broadband Optical Frontend Module Integrated with Bandwidth Multiplexing Function. - Masanori Nakamura; Fukutaro Hamaoka; Munehiko Nagatani; Yoshihiro Ogiso; Hitoshi Wakita; Hiroshi Yamazaki; Takayuki Kobayashi; Minoru Ida; Hideyuki Nosaka; Yutaka Miyamoto (OFC, 2019)

1.04 Tbps/Carrier Probabilistically Shaped PDM-64QAM WDM Transmission Over 240 km Based on Electrical Spectrum Synthesis. - Masanori Nakamura; Fukutaro Hamaoka; Munehiko Nagatani; Hiroshi Yamazaki; Takayuki Kobayashi; Asuka Matsushita; Seiji Okamoto; Hitoshi Wakita; Hideyuki Nosaka; Yutaka Miyamoto (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)

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)

Digital-Preprocessed Analog-Multiplexed DAC for High-Speed Optical Communications. - Hiroshi Yamazaki; Munehiko Nagatani; Hitoshi Wakita; Masanori Nakamura; Fukutaro Hamaoka; Takayuki Kobayashi; Yoshihiro Ogiso; Minoru Ida; Toshikazu Hashimoto; Hideyuki Nosaka; Yutaka Miyamoto (OECC/PSC, 2019)

Ultra-wideband Optical Receiver Using Electrical Spectrum Decomposition Technique. - Fukutaro Hamaoka; Masahito Nakamura; Munehiko Nagatani; Hitoshi Wakita; Takayuki Kobayashi; Hiroshi Yamazaki; Hideyuki Nosaka; Yutaka Miyamoto (ECOC, 2020)

Ultra-Wideband Transmission and High-Symbol Rate Signal Handling Technologies. - Fukutaro Hamaoka (OFC, 2020)

Long-Haul WDM Transmission with Over-1-Tb/s Channels using Electrically Synthesized High-Symbol-Rate Signals. - Takayuki Kobayashi; Masanori Nakamura; Fukutaro Hamaoka; Munehiko Nagatani; Hiroshi Yamazaki; Hideyuki Nosaka; Yutaka Miyamoto (OFC, 2020)

Wideband Inline-Amplified WDM Transmission using PPLN-Based OPA with Over-10-THz Bandwidth. - Takayuki Kobayashi; Shimpei Shimizu; Masahito Nakamura; Takeshi Umeki; Takushi Kazama; Ryoichi Kasahara; Fukutaro Hamaoka; Munehiko Nagatani; Hiroshi Yamazaki; Takayuki Mizuno; Hideyuki Nosaka; Yutaka Miyamoto (OFC, 2020)

Real-Time Demonstration of 500-Gbps/Lambda and 600-Gbps/Lambda WDM Transmission on Field-Installed Fibers. - Hideki Maeda; Hiroki Kawahara; Kohei Saito; Takeshi Seki; Takeo Sasai; Fukutaro Hamaoka (OFC, 2020)

Entropy and Symbol-Rate Optimized 120 GBaud PS-36QAM Signal Transmission over 2400 km at Net-Rate of 800 Gbps/λ. - Masanori Nakamura; Takayuki Kobayashi; Hiroshi Yamazaki; Fukutaro Hamaoka; Munehiko Nagatani; Hitoshi Wakita; Hideyuki Nosaka; Yutaka Miyamoto (OFC, 2020)

High spectral efficiency real-time 500-Gb/s/carrier transmission over field-installed G.654.E fiber link using forward and backward distributed Raman amplification. - Kohei Saito; Takeo Sasai; Fukutaro Hamaoka; Hiroki Kawahara; Takeshi Seki; Hideki Maeda (OFC, 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)

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)

A Beyond-1-Tb/s Coherent Optical Transmitter Front-End Based on 110-GHz-Bandwidth 2: 1 Analog Multiplexer in 250-nm InP DHBT. - Munehiko Nagatani; Hitoshi Wakita; Hiroshi Yamazaki; Yoshihiro Ogiso; Miwa Mutoh; Minoru Ida; Fukutaro Hamaoka; Masanori Nakamura; Takayuki Kobayashi; Yutaka Miyamoto; Hideyuki Nosaka (IEEE J. Solid State Circuits, 2020)

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

13.4-Tb/s WDM Transmission over 1, 280 km Repeated only with PPLN-based Optical Parametric Inline Amplifier. - Takayuki Kobayashi; Shimpei Shimizu; Masanori Nakamura; Takushi Kazama; Takeshi Umeki; Ryoichi Kasahara; Fukutaro Hamaoka; Yutaka Miyamoto (ECOC, 2021)

High Symbol-Rate Signal Optimization for Long-Haul Transmission Systems over 1-Tbps/λ Net-Data Rate. - Masanori Nakamura; Fukutaro Hamaoka; Takayuki Kobayashi; Hiroshi Yamazaki; Munehiko Nagatani; Yoshihiro Ogiso; Hitoshi Wakita; Yutaka Miyamoto (ECOC, 2021)

110-GHz-Bandwidth InP-HBT AMUX/ADEMUX Circuits for Beyond-1-Tb/s/ch Digital Coherent Optical Transceivers. - Munehiko Nagatani; Hitoshi Wakita; Teruo Jyo; Tsutomu Takeya; Hiroshi Yamazaki; Yoshihiro Ogiso; Miwa Mutoh; Yuta Shiratori; Minoru Ida; Fukutaro Hamaoka; Masanori Nakamura; Takayuki Kobayashi; et al. (CICC, 2022)

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)

50-Tb/s (1 Tb/s × 50 ch) WDM Transmission on Two 6.25-THz Bands Using Hybrid Inline Repeater of PPLN-based OPAs and Incoherent-forward-pumped DRA. - Takayuki Kobayashi; Shimpei Shimizu; Masanori Nakamura; Takeshi Umeki; Takushi Kazama; Junji Yoshida; Shigehiro Takasaka; Yasuto Tatamida; Hiroto Kawakami; Fukutaro Hamaoka; Munehiko Nagatani; Hiroshi Yamazaki; et al. (OFC, 2022)

High Information Rate of 128-GBaud 1.8-Tb/s and 64-GBaud 1.03-Tb/s Signal Generation and Detection Using Frequency-Domain 8×2 MIMO Equalization. - Masanori Nakamura; Takayuki Kobayashi; Fukutaro Hamaoka; Yutaka Miyamoto (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)

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)

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)

103-ch. 132-Gbaud PS-QAM Signal Inline-amplified Transmission with 14.1-THz Bandwidth Lumped PPLN-based OPAs over 400-km G.652.D SMF. - Takayuki Kobayashi; Shimpei Shimizu; Masanori Nakamura; Takushi Kazama; Masashi Abe; Takeshi Umeki; Akira Kawai; Fukutaro Hamaoka; Munehiko Nagatani; Hiroshi Yamazaki; Yutaka Miyamoto (OFC, 2023)

Beyond 200-GBd QAM Signal Detection Based on Trellis-path-limited Sequence Estimation Supporting Soft-decision Forward Error Correction. - Masanori Nakamura; Hiroki Taniguchi; Shuto Yamamoto; Fukutaro Hamaoka; Munehiko Nagatani; Teruo Jyo; Miwa Mutoh; Yuta Shiratori; Hitoshi Wakita; Takayuki Kobayashi; Hiroyuki Takahashi; Yutaka Miyamoto (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)

C+L+U-Band 14.85-THz WDM Transmission Over 80-km-Span G.654.E Fiber with Hybrid PPLN-OPA/EDFA U-Band Lumped Repeater Using 144-Gbaud PCS-QAM Signals. - Takayuki Kobayashi; Shimpei Shimizu; Akira Kawai; Masanori Nakamura; Masashi Abe; Takushi Kazama; Takeshi Umeki; Munehiko Nagatani; Kosuke Kimura; Hitoshi Wakita; Yuta Shiratori; Fukutaro Hamaoka; et al. (OFC, 2024)

AMUX-based Bandwidth Tripler with Time-interleaved Nonlinear Digital Pre-distortion Enabling 216-GBd PS-PAM8 Signal. - Masanori Nakamura; Munehiko Nagatani; Hiroshi Yamazaki; Teruo Jyo; Miwa Mutoh; Yuta Shiratori; Hitoshi Wakita; Hiroki Taniguchi; Shuto Yamamoto; Fukutaro Hamaoka; Takayuki Kobayashi; Hiroyuki Takahashi; et al. (OFC, 2024)

Double-decker CDC-ROADM node for multi-band network with wavelength band granularity. - Kenya Suzuki; Masashi Ota; Yoshie Morimoto; Keita Yamaguchi; Fukutaro Hamaoka; Shuto Sugawara; Takeo Sasai; Takayuki Kobayashi; Masanori Nakamura; Satomi Katayose; Takeshi Umeki; Daisuke Ogawa; et al. (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)

100-GHz-bandwidth InP-based On-board Coherent Tx Front-end enabling 2-Tb/s/λ Optical Transmission. - Hitoshi Wakita; Munehiko Nagatani; Yoshihiro Ogiso; Masanori Nakamura; Fukutaro Hamaoka; Yuta Shiratori; Takayuki Kobayashi; Yutaka Miyamoto; Hiroyuki Takahashi (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)

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)

27-THz ISRS-Supported Transmission Over 1040 km in S+C+L+U and Extreme Longer-Wavelength Band. - Shimpei Shimizu; Kosuke Kimura; Akira Kawai; Masashi Abe; Shunya Konno; Takushi Kazama; Masanori Nakamura; Fukutaro Hamaoka; Koji Enbutsu; Takahiro Kashiwazaki; Munehiko Nagatani; Hitoshi Wakita; et al. (OFC, 2025)