Evaluation of FSK light labels superimposed on 112 Gbps DP-QPSK signal with real-time coherent receiver and optical filter based decoder for light path tracing. - Goji Nakagawa; Shoichiro Oda; Kyosuke Sone; Yasuhiko Aoki; Kazuo Hironishi; Takahito Tanimura; Takeshi Hoshida; Jens C. Rasmussen (OFC/NFOEC, 2013)

Nonlinear transmission of 6PolSK-QPSK signals using coded modulation and digital back propagation. - Takahito Tanimura; Saleem Alreesh; Johannes Karl Fischer; Carsten Schmidt-Langhorst; Felix Frey; Christian Meuer; Robert Elschner; Lutz Molle; Colja Schubert (OFC/NFOEC, 2013)

Digital nonlinear compensation for spectrally efficient superchannel transmission at 400Gbit/s and beyond. - Takeshi Hoshida; Takahito Tanimura; Tomofumi Oyama; Shoichiro Oda; Hisao Nakashima; Yangyang Fan; Liang Dou; Zhenning Tao; Jens C. Rasmussen (ECOC, 2014)

Impact of fiber nonlinearity on duobinary-QPSK in super-Nyquist WDM transmission. - Tomofumi Oyama; Takahito Tanimura; Hisao Nakashima; Takeshi Hoshida; Zhenning Tao; Jens C. Rasmussen (ECOC, 2014)

Tolerances for add/drop operation of a coherent multiplexing node based on fiber frequency conversion. - Thomas Richter 004; Carsten Schmidt-Langhorst; Robert Elschner; Tomoyuki Kato; Takahito Tanimura; Shigeki Watanabe; Colja Schubert (ECOC, 2014)

Soft decision forward error correction over nonlinear transmission of 1-Tb/s superchannel. - Takahito Tanimura; Yohei Koganei; Hisao Nakashima; Takeshi Hoshida; Jens C. Rasmussen (ECOC, 2014)

Next generation photonic node architecture using software-defined universal transceivers. - Yasuhiko Aoki; Xi Wang 001; Goji Nakagawa; Shoichiro Oda; Kyosuke Sone; Takahito Tanimura; Takeshi Hoshida; Paparao Palacharla; Motoyoshi Sekiya; Jens C. Rasmussen (OFC, 2014)

Crosstalk analysis of FSK light label on 112 Gbps DP-QPSK signal in CNCG ROADM network. - Goji Nakagawa; Shoichiro Oda; Kyosuke Sone; Yasuhiko Aoki; Kazuo Hironishi; Takahito Tanimura; Takeshi Hoshida; Jens C. Rasmussen (OFC, 2014)

Coherent in-line substitution of OFDM subcarriers using fiber-frequency conversion and free-running lasers. - Thomas Richter 004; Carsten Schmidt-Langhorst; Robert Elschner; Tomoyuki Kato; Takahito Tanimura; Shigeki Watanabe; Colja Schubert (OFC, 2014)

Coherent reception and 126 GHz bandwidth digital signal processing of CO-OFDM superchannel generated by fiber frequency conversion. - Takahito Tanimura; Tomoyuki Kato; Ryo Okabe; Shoichiro Oda; Thomas Richter 004; Robert Elschner; Carsten Schmidt-Langhorst; Colja Schubert; Jens C. Rasmussen; Shigeki Watanabe (OFC, 2014)

Three Benefits Brought by Perturbation Back-Propagation Algorithm in 224Gb/s DP-16QAM Transmission. - Shoichiro Oda; Takahito Tanimura; Takeshi Hoshida; Yuichi Akiyama; Hisao Nakashima; Kyosuke Sone; Zhenning Tao; Jens C. Rasmussen (IEICE Trans. Commun., 2014)

Experimental investigation on nonlinear tolerance of subcarrier multiplexed signals with spectrum optimization. - Hisao Nakashima; Takahito Tanimura; Tomofumi Oyama; Yuichi Akiyama; Takeshi Hoshida; Jens C. Rasmussen (ECOC, 2015)

Spatially distributed aggregation of a polarization-division multiplexed superchannel by frequency conversion in fiber. - Thomas Richter 004; Robert Elschner; Carsten Schmidt-Langhorst; Tomoyuki Kato; Takahito Tanimura; Shigeki Watanabe; Colja Schubert (ECOC, 2015)

Distributed 1-Tb/s all-optical aggregation capacity in 125-GHz optical bandwidth by frequency conversion in fiber. - Thomas Richter 004; Carsten Schmidt-Langhorst; Robert Elschner; Lutz Molle; Saleem Alreesh; Tomoyuki Kato; Takahito Tanimura; Shigeki Watanabe; Johannes Karl Fischer; Colja Schubert (ECOC, 2015)

Broadband coherent-optical add/drop multiplexing over 400-GHz bandwidth by fiber frequency conversion. - Tomoyuki Kato; Takahito Tanimura; Thomas Richter 004; Carsten Schmidt-Langhorst; Robert Elschner; Colja Schubert; Shigeki Watanabe (OFC, 2015)

Complexity reduction of perturbation-based nonlinear compensator by sub-band processing. - Tomofumi Oyama; Hisao Nakashima; Takeshi Hoshida; Takahito Tanimura; Yuichi Akiyama; Zhenning Tao; Jens C. Rasmussen (OFC, 2015)

Generation of ultra-dense superchannels using frequency conversion in optical fibers. - Thomas Richter 004; Carsten Schmidt-Langhorst; Robert Elschner; Tomoyuki Kato; Takahito Tanimura; Shigeki Watanabe; Colja Schubert (OFC, 2015)

Versatile coherent in-line 4-, 16-, 32-QAM subcarrier add/drop-multiplexing by optical frequency conversion. - Carsten Schmidt-Langhorst; Thomas Richter 004; Robert Elschner; Tomoyuki Kato; Takahito Tanimura; Shigeki Watanabe; Colja Schubert (OFC, 2015)

PDL-tolerant signal generation by digital spectrum slicing and polarization control. - Takahito Tanimura; Tomofumi Oyama; Hisao Nakashima; Jens C. Rasmussen (OFC, 2015)

420Gbit/s DP-64QAM Nyquist-FDM single-carrier system. - Liang Dou; Xiaofei Su; Yangyang Fan; Hao Chen 058; Ying Zhao; Zhenning Tao; Takahito Tanimura; Takeshi Hoshida; Jens C. Rasmussen (OFC, 2016)

In-line optical signal multiplexing by polarization-insensitive fiber frequency conversion. - Tomoyuki Kato; Takahito Tanimura; Takeshi Hoshida; Thomas Richter 004; Robert Elschner; Carsten Schmidt-Langhorst; Colja Schubert; Shigeki Watanabe (OFC, 2016)

Latency and bandwidth programmable transceivers with power arbitration among multi-tenanted signals. - Takahito Tanimura; Liang Dou; Xiaofei Su; Takeshi Hoshida; Yasuhiko Aoki; Zhenning Tao; Jens C. Rasmussen; Makoto Suzuki; Hiroyuki Morikawa (OFC, 2016)

Fiber Nonlinearity Mitigation in 800-km Transmission of a 1.6-Tb/s Superchannel Using Waveband-Shift-Free Optical Phase Conjugation. - Carsten Schmidt-Langhorst; Isaac Sackey; Robert Elschner; Tomoyuki Kato; Takahito Tanimura; Shigeki Watanabe; Takeshi Hoshida; Colja Schubert (ECOC, 2017)

Continuously tunable optical frequency shift of 1.6-Tb/s superchannel up to THz-range by polarization switched frequency conversion. - Tomoyuki Kato; Shigeki Watanabe; Takahito Tanimura; Thomas Richter 004; Robert Elschner; Carsten Schmidt-Langhorst; Colja Schubert; Takeshi Hoshida (OFC, 2017)

Novel wavelength-shift-free optical phase conjugator used for fiber nonlinearity mitigation in 200-Gb/s PDM-16QAM transmission. - Isaac Sackey; Robert Elschner; Carsten Schmidt-Langhorst; Tomoyuki Kato; Takahito Tanimura; Shigeki Watanabe; Takeshi Hoshida; Colja Schubert (OFC, 2017)

Any-to-Any Signal Frequency Shifting Across Entire C-Band Using Continuously Tuneable Optical Frequency Shifter. - Tomoyuki Kato; Shigeki Watanabe; Takahito Tanimura; Carsten Schmidt-Langhorst; Isaac Sackey; Robert Elschner; Colja Schubert; Takeshi Hoshida (ECOC, 2018)

Innovative Optical Networking by Optical Performance Monitoring and Learning Process. - Shoichiro Oda; Martin Bouda; Yi Ge; Setsuo Yoshida; Takahito Tanimura; Yuichi Akiyama; Yoshio Hirose; Zhenning Tao; Tadashi Ikeuchi; Takeshi Hoshida (ECOC, 2018)

PDL Mitigation by Polarization-Time Codes with Simple Decoding and Pilot-Aided Demodulation. - Tomofumi Oyama; Hisao Nakashima; Yoshitaka Nomura; Guoxiu Huang; Takahito Tanimura; Takeshi Hoshida (ECOC, 2018)

Deep Neural Network Based Optical Monitor Providing Self-Confidence as Auxiliary Output. - Takahito Tanimura; Tomoyuki Kato; Shigeki Watanabe; Takeshi Hoshida (ECOC, 2018)

Fiber-Optic Frequency Shifting of THz-Range WDM Signal Using Orthogonal Pump-Signal Polarization Configuration. - Tomoyuki Kato; Shigeki Watanabe; Takahito Tanimura; Robert Elschner; Carsten Schmidt-Langhorst; Colja Schubert; Takeshi Hoshida (OFC, 2018)

Single-Wavelength, Single-Photodiode per Polarization 276 Gb/s PDM 8-QAM over 100 km of SSMF. - Rafael Puerta; Tomohiro Yamauchi; Takahito Tanimura; Yuichi Akiyama; Tomoo Takahara; Idelfonso Tafur Monroy; Takeshi Hoshida (OFC, 2018)

Distributed Aggregation and Reception of a 400-Gb/s Net Rate Superchannel in a Single-Photodiode 110-GHz Kramers-Kronig Receiver. - Isaac Sackey; Carsten Schmidt-Langhorst; Robert Emmerich; Robert Elschner; Tomoyuki Kato; Takahito Tanimura; Shigeki Watanabe; Takeshi Hoshida; Colja Schubert (OFC, 2018)

Data-analytics-based Optical Performance Monitoring Technique for Optical Transport Networks. - Takahito Tanimura; Takeshi Hoshida; Tomoyuki Kato; Shigeki Watanabe; Hiroyuki Morikawa (OFC, 2018)

Simple Learning Method to Guarantee Operational Range of Optical Monitors. - Takahito Tanimura; Takeshi Hoshida; Tomoyuki Kato; Shigeki Watanabe; Hiroyuki Morikawa (JOCN, 2018)

Fiber Nonlinear Noise-to-Signal Ratio Estimation by Machine Learning. - Ke Zhang; Yangyang Fan; Tong Ye; Zhenning Tao; Shoichiro Oda; Takahito Tanimura; Yuichi Akiyama; Takeshi Hoshida (OFC, 2019)

Convolutional Neural Network-Based Optical Performance Monitoring for Optical Transport Networks. - Takahito Tanimura; Takeshi Hoshida; Tomoyuki Kato; Shigeki Watanabe; Hiroyuki Morikawa (JOCN, 2019)

Advanced Data-Analytics-Based Fiber-Longitudinal Monitoring for Optical Transport Networks. - Takahito Tanimura; Setsuo Yoshida; Shoichiro Oda; Kazuyuki Tajima; Takeshi Hoshida (ECOC, 2020)

Single-Pixel IQ Monitor via Computational Coherent Reception with Widely Linear Phase Retrieval. - Yuki Yoshida 001; Takahito Tanimura; Setsuo Yoshida; Takeshi Hoshida; Naokatsu Yamamoto (ECOC, 2020)

Advanced DSP for Monitoring and Mitigation in Optical Transport Networks. - Takeshi Hoshida; Takahito Tanimura; Shoichiro Oda; Setsuo Yoshida; Hisao Nakashima; Guoxiu Huang; Zhenning Tao (OFC, 2020)

Concept and implementation study of advanced DSP-based fiber-longitudinal optical power profile monitoring toward optical network tomography [Invited]. - Takahito Tanimura; Setsuo Yoshida; Kazuyuki Tajima; Shoichiro Oda; Takeshi Hoshida (JOCN, 2021)

Faster-Than-Nyquist IM/DD THP-PAM4 Signaling Using Directly-Modulated Laser with Laser Non-Linear Skew Compensation. - Nobuhiko Kikuchi; Riu Hirai; Takahito Tanimura (OECC/PSC, 2022)

Optical Status Representation by Collaborative and Unsupervised Learning. - Takahito Tanimura; Riu Hirai; Nobuhiko Kikuchi (OECC/PSC, 2022)

Compressing Model before Federated Learning by Transferrable Surrogate Lottery Ticket. - Takahito Tanimura; Masayuki Takase (CCNC, 2023)

Upgrade of Deep Neural Network-based Optical Monitors by Communication-Efficient Federated Learning. - Takahito Tanimura; Masayuki Takase (OFC, 2023)

Physical Status Representation in Multiple Administrative Optical Networks by Federated Unsupervised Learning. - Takahito Tanimura; Riu Hirai; Nobuhiko Kikuchi (IEICE Trans. Commun., 2023)

Optical Single-Sideband (SSB) Conversion Technique Using Phase Modulator for High-Speed Short-Reach IM/DD PAM Signaling. - Nobuhiko Kikucih; Riu Hirai; Takahito Tanimura (OFC, 2024)

Federated Discrete Prompt Tuning for Language Models Using Synthetic Examples. - Takahito Tanimura; Wakako Nakano; Yuichi Kitagawa; Masayuki Takase (CCNC, 2025)

Soft-Label Caching and Sharpening for Communication-Efficient Federated Distillation. - Kitsuya Azuma; Takayuki Nishio; Yuichi Kitagawa; Wakako Nakano; Takahito Tanimura (CoRR, 2025)