An experimental 16-Mbit CMOS DRAM chip with a 100-MHz serial read/write mode. - Shigeyoshi Watanabe; Yukihito Oowaki; Yasuo Itoh; Koji Sakui; Kenji Numata; Tsuneaki Fuse; Takayuki Kobayashi; Kenji Tsuchida; Masahiko Chiba; Takahiko Hara; Masako Ohta; Fumio Horiguchi; et al. (IEEE J. Solid State Circuits, 1989)

Motion Planning Approach of a Multi-Fingered Robot for Carton Folding Operations. - Hidetsugu Terada; Takayuki Kobayashi (ICINCO (2), 2004)

Frequency-Domain Equalization for Coherent Optical Single-Carrier Transmission Systems. - Koichi Ishihara; Takayuki Kobayashi; Riichi Kudo; Yasushi Takatori; Akihide Sano; Yutaka Miyamoto (IEICE Trans. Commun., 2009)

A Band-Divided Receiver Prototype for Wideband Optical Signals. - Munehiro Matsui; Riichi Kudo; Yasushi Takatori; Tadao Nakagawa; Koichi Ishihara; Masato Mizoguchi; Takayuki Kobayashi; Yutaka Miyamoto (IEICE Trans. Commun., 2011)

Ultra-High Capacity Optical Transmission Technologies for 100 Tbit/s Optical Transport Networks. - Akihide Sano; Takayuki Kobayashi; Eiji Yoshida; Yutaka Miyamoto (IEICE Trans. Commun., 2011)

First demonstration of multi-span transmission using phase and amplitude regeneration in PPLN-based PSA. - Takeshi Umeki; Masaki Asobe; H. Takara; Takayuki Kobayashi; Hirokazu Kubota; Hirokazu Takenouchi; Yutaka Miyamoto (OFC/NFOEC, 2013)

12-core × 3-mode dense space division multiplexed transmission over 40 km employing multi-carrier signals with parallel MIMO equalization. - Takayuki Mizuno; Takayuki Kobayashi; Hidehiko Takara; Akihide Sano; Hiroto Kawakami; T. Nakagawa; Yutaka Miyamoto; Yoshiteru Abe; T. Goh; Manabu Oguma; Taiji Sakamoto; Yusuke Sasaki; et al. (OFC, 2014)

Modal crosstalk measurement based on intensity tone for few-mode fiber transmission systems. - Takayuki Mizuno; Hidehiko Takara; Manabu Oguma; Takayuki Kobayashi; Yutaka Miyamoto (OFC, 2014)

Petabit/s transmission using multicore fibers. - Akihide Sano; Hidehiko Takara; Takayuki Kobayashi; Yutaka Miyamoto (OFC, 2014)

WDM passive optical network managed with embedded pilot tone for mobile fronthaul. - Kazuaki Honda; Takayuki Kobayashi; Tatsuya Shimada; Jun Terada; Akihiro Otaka (ECOC, 2015)

Adaptive MIMO equalization for few-mode fiber transmission with various differential mode delays. - D. Lee; Kohki Shibahara; Takayuki Kobayashi; Takayuki Mizuno; Hidehiko Takara; Akihide Sano; Hiroto Kawakami; T. Nakagawa; Yutaka Miyamoto (ECOC, 2015)

Formulation of Relationship Between Productivity and Energy Consumption in Manufacturing System. - Takayuki Kobayashi; Makoto Yamaguchi; Hironori Hibino (APMS (1), 2015)

Dense SDM (12-core × 3-mode) transmission over 527 km with 33.2-ns mode-dispersion employing low-complexity parallel MIMO frequency-domain equalization. - Kohki Shibahara; Takayuki Mizuno; Hidehiko Takara; Akihide Sano; H. Kawakami; D. Lee; Yutaka Miyamoto; Hirotaka Ono 002; Manabu Oguma; Yoshiteru Abe; Takayuki Kobayashi; Takashi Matsui; et al. (OFC, 2015)

Efficient accommodation of mobile fronthaul and secondary services in a TDM-PON system with wireless TDD frame monitor. - Daisuke Hisano; Tatsuya Shimada; Hiroshi Ou; Takayuki Kobayashi; Shigeru Kuwano; Jun Terada; Akihiro Otaka (ICC, 2016)

Passive optical network range applicable to cost-effective mobile fronthaul. - Hiroshi Ou; Takayuki Kobayashi; Tatsuya Shimada; Daisuke Hisano; Jun Terada; Akihiro Otaka (ICC, 2016)

Bandwidth allocation scheme based on simple statistical traffic analysis for TDM-PON based mobile fronthaul. - Takayuki Kobayashi; Hiroshi Ou; Daisuke Hisano; Tatsuya Shimada; Jun Terada; Akihiro Otaka (OFC, 2016)

Optical DP-High Order-QAM Transmission System for High-Speed Short Links Utilizing Copropagating Twin Local Lights. - Hiroto Kawakami; Takayuki Kobayashi; Yutaka Miyamoto (IEICE Trans. Commun., 2016)

Wide-Range and Fast-Tracking Non-Data-Aided Frequency Offset Estimator for QAM Optical Coherent Receivers. - Tadao Nakagawa; Takayuki Kobayashi; Koichi Ishihara; Yutaka Miyamoto (IEICE Trans. Commun., 2016)

Crosstalk Analysis of 32-Core Dense Space Division Multiplexed System for Higher Order Modulation Formats Using an Integrated Cladding-Pumped Amplifier. - Carlos Castro; Saurabh Jain; Yongmin Jung; Erik De Man; Stefano Calabrò; Klaus Pulverer; Marc Bohn; John R. Hayes; Shaif-Ul Alam; David J. Richardson; Yusuke Sasaki; Takayuki Mizuno; et al. (ECOC, 2017)

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)

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)

A Study on Lot-Size Dependence of Energy Consumption per Unit of Production Throughput Considering Buffer Capacity. - Hironori Hibino; Masahiro Yamamoto; Makoto Yamaguchi; Takayuki Kobayashi (Int. J. Autom. Technol., 2017)

Effective Utilization of Unallocated Intervals in TDD-Based Fronthaul Employing TDM-PON. - Daisuke Hisano; Tatsuya Shimada; Hiroshi Ou; Takayuki Kobayashi; Yu Nakayama; Hiroyuki Uzawa; Jun Terada; Akihiro Otaka (JOCN, 2017)

96-Gbaud PDM-8QAM Single Channel Transmission over 9, 600 km by Nonlinear Tolerance Enhancement using PPLN-based Optical Phase Conjugation. - Takayuki Kobayashi; Takeshi Umeki; Ryoichi Kasahara; Hiroshi Yamazaki; Munehiko Nagatani; Hitoshi Wakita; Hirokazu Takenouchi; Yutaka Miyamoto (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)

Ultra-High Bandwidth InP IQ Modulator co-assembled with Driver IC for Beyond 100-GBd CDM. - Yoshihiro Ogiso; Hitoshi Wakita; Munehiko Nagatani; Hiroshi Yamazaki; Masanori Nakamura; Takayuki Kobayashi; Johsuke Ozaki; Yuta Ueda; S. Nakano; Shigeru Kanazawa; Takuro Fujii; Yasuaki Hashizume; et al. (OFC, 2018)

Towards Practical Implementation of Optical Parametric Amplifiers Based on PPLN Waveguides. - Takeshi Umeki; Takushi Kazama; Takayuki Kobayashi; Koji Enbutsu; Osamu Tadanaga; Hirokazu Takenouchi; Ryoichi Kasahara; Yutaka Miyamoto (OFC, 2018)

Polarization-diversity In-line Phase Sensitive Amplifier for Simultaneous Amplification of Fiber-transmitted WDM PDM-16QAM Signals. - Takeshi Umeki; Takushi Kazama; Takayuki Kobayashi; Shigehiro Takasaka; Yasuhiro Okamura; Koji Enbutsu; Osamu Tadanaga; Hirokazu Takenouchi; Ryuichi Sugizaki; Atsushi Takada; Ryoichi Kasahara; Yutaka Miyamoto (OFC, 2018)

Nonlinear Phase-Shift Cancellation by Taking the Geometric Mean of WDM-Signal Phase-Conjugate Pair. - Takahisa Kodama; Akira Mizutori; Takayuki Kobayashi; Takayuki Mizuno; Masafumi Koga (IEICE Trans. Commun., 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)

PDM-16QAM WDM Transmission with 2nd-Order Forward-Pumped Distributed Raman Amplification Utilizing Incoherent Pumping. - Takayuki Kobayashi; Masahito Morimoto; Haruki Ogoshi; Junji Yoshida; Shigehiro Takasaka; 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)

Mode-Division Multiplexing Systems for High-Capacity Optical Transport Network. - Yutaka Miyamoto; Kohki Shibahara; Takayuki Mizuno; Takayuki Kobayashi (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)

Ultra-High Bandwidth InP IQ Modulator for Beyond 100-GBd Transmission. - Yoshihiro Ogiso; Josuke Ozaki; Yuta Ueda; Hitoshi Wakita; Munehiko Nagatani; Hiroshi Yamazaki; Masanori Nakamura; Takayuki Kobayashi; Shigeru Kanazawa; Takuro Fujii; Yasuaki Hashizume; Hiromasa Tanobe; et al. (OFC, 2019)

Full C-Band 3060-km DMD-Unmanaged 3-Mode Transmission with 40.2-Tb/s Capacity using Cyclic Mode Permutation. - Kohki Shibahara; Takayuki Mizuno; Hiroto Kawakami; Takayuki Kobayashi; Masanori Nakamura; Kota Shikama; Kazuhide Nakajima; Yutaka Miyamoto (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)

Long-Haul SDM Transmission Using Mode Division Multiplexing. - Kohki Shibahara; Takayuki Mizuno; Takayuki Kobayashi; Yutaka Miyamoto (OECC/PSC, 2019)

Nonlinearity mitigation of PDM-16QAM signal using multiple CSI-OPCs in ultra-long haul transmission without excess penalty. - Takeshi Umeki; Takayuki Kobayashi; Akihide Sano; Takuya Ikuta; Masashi Abe; Takushi Kazama; Koji Enbutsu; Ryoichi Kasahara; Yutaka Miyamoto (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)

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)

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)

Gain Ripple and Passband Narrowing Due to Residual Chromatic Dispersion in Non-Degenerate Phase-Sensitive Amplifiers. - Shimpei Shimizu; Takushi Kazama; Takayuki Kobayashi; Takeshi Umeki; Koji Enbutsu; Ryoichi Kasahara; Yutaka Miyamoto (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)

Nonlinearity Mitigation of PDM-16QAM Signals Using Multiple CSI-OPCs in Ultra-Long-Haul Transmission without Excess Penalty. - Takeshi Umeki; Takayuki Kobayashi; Akihide Sano; Takuya Ikuta; Masashi Abe; Takushi Kazama; Koji Enbutsu; Ryoichi Kasahara; Yutaka Miyamoto (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)

Estimation of the effects of inset heights and slit configurations in an acetabular cup on the pull-out behavior of an artificial hip joint with a structure for preventing dislocation using finite element analysis. - Yuki Kawamura; Mitsushi Ohmasa; Takayuki Kobayashi; Yoshihito Matsufuji; Makoto Saito; Yoshinori Uwa; Saiji Washio; Ei Yamamoto (Medical Biol. Eng. Comput., 2020)

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)

8-Tbps (20 × 400 Gbps) Unrepeated Transmission over 80 km with 2-THz PPLN-Based Phase-Sensitive Amplification Using Precise Chromatic Dispersion Pre-Compensation. - Shimpei Shimizu; Takayuki Kobayashi; Takushi Kazama; Takeshi Umeki; Masanori Nakamura; Koji Enbutsu; Ryoichi Kasahara; Yutaka Miyamoto (ECOC, 2021)

Wideband PPLN-based optical parametric amplifiers for scalable optical transport network. - Yutaka Miyamoto; Takayuki Kobayashi; Takeshi Umeki; Takushi Kazama; Koji Enbutsu; Shimpei Shimizu; Ryoichi Kasahara (OFC, 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)

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)

4-Dimensional IQ Characteristic Estimation for Polarization-multiplexed Coherent Transceivers. - Akira Kawai; Masanori Nakamura; Takayuki Kobayashi; Yutaka Miyamoto (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)

Mitigation of Intercore Crosstalk Impact with PPLN-based Optical Spectrum Inversion. - Megumi Hoshi; Kohki Shibahara; Shimpei Shimizu; Takayuki Kobayashi; Takeshi Umeki; Takushi Kazama; Kei Watanabe; Takayoshi Mori; Yusuke Yamada; Kazuhide Nakajima; Yutaka Miyamoto (OECC/PSC, 2022)

WDM Transmission in S-Band Using PPLN-Based Wavelength Converters and 400-Gb/s C-Band Real-Time Transceivers. - Tomoyuki Kato; Hidenobu Muranaka; Yu Tanaka; Yuichi Akiyama; Takeshi Hoshida; Shimpei Shimizu; Takayuki Kobayashi; Takushi Kazama; Takeshi Umeki; Kei Watanabe; Yutaka Miyamoto (OECC/PSC, 2022)

Resolution-aware Smoothing and Backward Filter Convergence for Accurate Optical Performance Monitoring. - Akira Kawai; Takayuki Kobayashi; Masanori Nakamura; Yutaka Miyamoto (OECC/PSC, 2022)

Generation of Carrier-Synchronized PDM Signal-Idler Pair for Polarization-Independent Phase-Sensitive Amplification. - Shimpei Shimizu; Takushi Kazama; Takeshi Umeki; Takayuki Kobayashi; Koji Enbutsu; Kei Watanabe; Yutaka Miyamoto (OECC/PSC, 2022)

Channel Arrangement Design in Lumped Amplified WDM Transmission over NZ-DSF Link with Nonlinearity Mitigation Using Optical Phase Conjugation. - Shimpei Shimizu; Takayuki Kobayashi; Takeshi Umeki; Takushi Kazama; Koji Enbutsu; Ryoichi Kasahara; Yutaka Miyamoto (IEICE Trans. Commun., 2022)

Coherent Optical Transceivers Scaling and Integration Challenges. - Takayuki Kobayashi; Junho Cho; Marco Lamponi; Guilhem de Valicourt; Christopher R. Doerr (Proc. IEEE, 2022)

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)

Remote Digital Holographic Characterization of a 75.2 km Few-Mode Fiber without Reference Wave Transfer. - Akira Kawai; Shimpei Shimizu; Kohki Shibahara; Takayuki Kobayashi; Yutaka Miyamoto (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)

Experimental Demonstration of Cascadable PPLN-Based Inter-Band Wavelength Converters for Band-Switchable Multi-Band Optical Cross-Connect. - Haruka Minami; Kenta Hirose; Takafumi Fukatani; Masahiro Nakagawa; Takeshi Seki; Shimpei Shimizu; Takayuki Kobayashi; Takushi Kazama; Koji Enbutsu; Kei Watanabe; Takeshi Umeki; Takashi Miyamura; et al. (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)

38.4-Tbps Inline-amplified Transmission Using PPLN-based Optical Parametric Amplifier over 6 THz within L- and U-bands. - Shimpei Shimizu; Takayuki Kobayashi; Akira Kawai; Takushi Kazama; Masanori Nakamura; Koji Enbutsu; Takahiro Kashiwazaki; Masashi Abe; Takeshi Umeki; Yutaka Miyamoto; Tomoyuki Kato; Yu Tanaka; et al. (OFC, 2023)

S-Band WDM Transmission Using PPLN-Based Wavelength Converters and 400-Gb/s C-Band Real-Time Transceivers. - Tomoyuki Kato; Hidenobu Muranaka; Yu Tanaka; Yuichi Akiyama; Takeshi Hoshida; Shimpei Shimizu; Takayuki Kobayashi; Takushi Kazama; Takeshi Umeki; Kei Watanabe; Yutaka Miyamoto (IEICE Trans. Commun., 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 4D×D MIMO Equalizer Enabling 2.6-Tb/s/λ SDM Signal Reception over Dynamic Four-Coupled-Core Cabled Transmission Line. - Akira Kawai; Kohki Shibahara; Masanori Nakamura; Takayuki Kobayashi; Takayoshi Mori; Ryota Imada; Taiji Sakamoto; Yusuke Yamada; Kazuhide Nakajima; Yutaka Miyamoto (OFC, 2024)

Accurate SNR Estimation in C+L-band 10-THz Hybrid Raman-EDFA Amplified Transmission Using Two-Stage Power Profile Calculation Accounting for Pump Depletion. - Kosuke Kimura; Shimpei Shimizu; Takayuki Kobayashi; Masanori Nakamura; Yutaka Miyamoto (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)

Cascadability of PPLN-Based Inter-Band Wavelength Conversion for Band-Switchable Multi-Band Optical Cross-Connect. - Haruka Minami; Takafumi Fukatani; Masahiro Nakagawa; Takeshi Seki; Shimpei Shimizu; Takayuki Kobayashi; Takushi Kazama; Koji Enbutsu; Takeshi Umeki; Rie Hayashi; Takeshi Kuwahara (OFC, 2024)

Modeling and Experimental Verification in S+C+L+U Quadrable-Band WDM Transmission System using C+L-Band Transceivers and Wavelength Converters. - Hidenobu Muranaka; Tomoyuki Kato; Tomohiro Yamauchi; Hiroyuki Irie; Hiroki Ooi; Yu Tanaka; Shimpei Shimizu; Takayuki Kobayashi; Takushi Kazama; Masashi Abe; Takeshi Umeki; Yutaka Miyamoto; 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)

PPLN-Based Polarization-Diverse Phase-Sensitive Amplification of 96-Gbaud PDM-PCS-64QAM Signal with Carrier-Phase-Locked Phase-Conjugated Twin Waves. - Shimpei Shimizu; Takushi Kazama; Takeshi Umeki; Koji Enbutsu; Masanori Nakamura; Masashi Abe; Takayuki Kobayashi; Yutaka Miyamoto (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)

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)

9-THz Wideband PPLN-Based Wavelength Converter for Simultaneous Conversion of C+L-Band WDM Signal to Full S-Band. - Shunya Konno; Shimpei Shimizu; Masashi Abe; Takushi Kazama; Koji Enbutsu; Takahiro Kashiwazaki; Masanori Nakamura; Takayuki Kobayashi; Yutaka Miyamoto; Takeshi Umeki (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)

Full C-band 3317-km 12-Coupled-Core-Fiber Transmission with 266.2-Tbps Capacity Using Field-Installed Fiber-Optic Cable. - Kohki Shibahara; Akira Kawai; Megumi Hoshi; Masanori Nakamura; Takayuki Kobayashi; Ryota Imada; Takayoshi Mori; Taiji Sakamoto; Yusuke Yamada; Kazuhide Nakajima; Munehiko Nagatani; Hitoshi Wakita; 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)

Cross-λ Phase Diversity: A Simple Chromatic-Dispersion-Tolerant Direct-Detection Scheme. - Hiroshi Yamazaki; Masanori Nakamura; Josuke Ozaki; Yoshihiro Ogiso; Takayuki Kobayashi; Toshikazu Hashimoto; Yutaka Miyamoto (OFC, 2025)