All-optical wide-area node connections assisted with optical parametric regeneration and wavelength conversion. - Junya Kurumida; Hitoshi Takeshita; Kenji Mizutani; Kiyo Ishii; Akio Tajima; Shu Namiki (OFC/NFOEC, 2013)

Prototype Highly Integrated 8×48 Transponder Aggregator Based on Si Photonics for Multi-Degree Colorless, Directionless, Contentionless Reconfigurable Optical Add/Drop Multiplexer. - Hitoshi Takeshita; Tomoyuki Hino; Kiyo Ishii; Junya Kurumida; Shu Namiki; Shigeru Nakamura; Shigeki Takahashi; Akio Tajima (IEICE Trans. Electron., 2013)

First demonstration of ultra-low-energy hierarchical multi-granular optical path network dynamically controlled through NSI-CS for video related applications. - Junya Kurumida; Kiyo Ishii; Atsuko Takefusa; Yusuke Tanimura; Shigeyuki Yanagimachi; Hitoshi Takeshita; Akio Tajima; Kiyoshi Fukuchi; H. Honma; W. Odashima; Hiroshi Onaka; Ken Tanizawa; et al. (ECOC, 2014)

A Proposal of Cyclic Sleep Control Technique for Backup Resources in ROADM Systems to Reduce Power Consumption of Photonic Network. - Tomoyuki Hino; Hitoshi Takeshita; Kiyo Ishii; Junya Kurumida; Shu Namiki; Shigeru Nakamura; Akio Tajima (IEICE Trans. Commun., 2014)

Utilization of spectrum slot fragmentation to improve network resource efficiency on elastic optical network. - Shinsuke Fujisawa; Hitoshi Takeshita; Tomoyuki Hino; Akio Tajima; Kiyoshi Fukuchi (OFC, 2015)

Compact and low-loss 8×8 silicon photonic switch module for transponder aggregators in CDC-ROADM application. - Shigeru Nakamura; Shigeyuki Yanagimachi; Hitoshi Takeshita; Akio Tajima; Tomoaki Kato; Tomoyuki Hino; Kiyoshi Fukuchi (OFC, 2015)

Transmission of 256Gb/s PM-16QAM Signal through 7-Core MCF and MC-EDFA with Common Cladding and Variable Shared Core Pumping for Reduction of Power Consumption. - Emmanuel Le Taillandier de Gabory; Keiichi Matsumoto; Sadao Fujita; Hitoshi Takeshita; Shigeyuki Yanagimachi (ECOC, 2017)

Optical Node with Passband Overlapped Filter and Impairment Aware Least Slot Count Path First Algorithm for Guardband-Less Elastic Optical Network. - Hitoshi Takeshita; Takefumi Oguma; Shinsuke Fujisawa; Baku Yatabe; Yuta Suzuki; Akio Tajima; Emmanuel Le Taillandier de Gabory (ECOC, 2017)

Demonstration of fast cooperative operations in disaggregated optical node systems. - Kiyo Ishii; Satoshi Suda; Shigeyuki Yanagimachi; Hitoshi Takeshita; Dai Suzuki; Takafumi Terahara; Shu Namiki (OFC, 2017)

Network fault protection performance enhancement by using elastic optical path. - Hitoshi Takeshita; Takefumi Oguma; Shinsuke Fujisawa; Yuta Suzuki; Baku Yatabe; Akio Tajima (OFC, 2017)

Experimental Demonstration of 1480nm Cladding Pumped Multicore EDFA. - Keiichi Matsumoto; Hitoshi Takeshita; K. Maeda; Shigehiro Takasaka; Ryuichi Sugizaki; Emmanuel Le Taillandier de Gabory (ECOC, 2018)

Transmission of 200Gbps PM-16QAM Signal Through 7-Core MCF and MC-EDFA Using Novel Turbo Cladding Pumping Scheme for Improved Efficiency of the Optical Amplification. - Hitoshi Takeshita; Keiichi Matsumoto; Emmanuel Le Taillandier de Gabory (ECOC, 2018)

Low-loss Silicon Photonic Switch Module Technology and Its Use for to Transponder Aggregators in Optical Network Nodes. - Shigeru Nakamura; Shigeyuki Yanagimachi; Hitoshi Takeshita; Akio Tajima (OFC, 2018)

Reduction of the Power Consumption in a WDM/SDM Network by using Cladding Pump Scheme MC-EDFA with Impairment Aware Least Wavelength Bandwidth Routing. - Hitoshi Takeshita; Keiichi Matsumoto; Emmanuel Le Taillandier de Gabory (OFC, 2018)

Enhancing Protection Performance by Effectively Using Spectral Slots of Impairment-Aware Elastic Optical Networks [Invited]. - Hitoshi Takeshita; Takefumi Oguma; Shinsuke Fujisawa; Yuta Suzuki; Baku Yatabe; Akio Tajima; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2018)

Reduction in Power Consumption in Multi-Core Amplifier. - Emmanuel Le Taillandier de Gabory; Hitoshi Takeshita; Keiichi Matsumoto; Shigeyuki Yanagimachi (OFC, 2019)

Improvement of the Pump Recycling Ratio of Turbo Cladding Pumped MC-EDFA with Paired Spatial Pump Combiner and Splitter. - Hitoshi Takeshita; Keiichi Matsumoto; Shigeyuki Yanagimachi; Emmanuel Le Taillandier de Gabory (OFC, 2019)

Core Dependence of the Optical Gain of Turbo Cladding Pumped 7-core MC-EDFA. - Hitoshi Takeshita; Keiichi Matsumoto; Shigeyuki Yanagimachi; Emmanuel Le Taillandier de Gabory (OECC/PSC, 2019)

Past, Current and Future Technologies for Optical Submarine Cables. - Hitoshi Takeshita; Masaki Sato; Yoshihisa Inada; Emmanuel Le Taillandier de Gabory; Yuichi Nakamura 002 (PHOTONICS@SC, 2019)

Improved Optical Amplification Efficiency by Using Turbo Cladding Pumping Scheme for Multicore Fiber Optical Networks. - Hitoshi Takeshita; Keiichi Matsumoto; Hiroshi Hasegawa; Ken-ichi Sato; Emmanuel Le Taillandier de Gabory (IEICE Trans. Commun., 2019)

Evaluation of the Signal Amplified by CC-MC-EDFA under Inter-core Crosstalk Using a Scalable SDM/TDM Translation Method. - Hitoshi Takeshita; Manabu Arikawa; Keiichi Matsumoto; Kohei Hosokawa; Emmanuel Le Taillandier de Gabory (ECOC, 2020)

Real-Time Optical Gain Monitoring for Coupled Core Multi-Core EDFA with Strong Inter-Core Crosstalk. - Hitoshi Takeshita; Keiichi Matsumoto; Hidemi Noguchi; Emmanuel Le Taillandier de Gabory (OFC, 2020)

First Demonstration of Uncoupled 4-Core Multicore Fiber in a Submarine Cable Prototype with Integrated Multicore EDFA. - Hitoshi Takeshita; Kohei Nakamura; Yuushi Matsuo; Takanori Inoue; Daishi Masuda; Tetsuya Hiwatashi; Kohei Hosokawa; Yoshihisa Inada; Emmanuel Le Taillandier de Gabory (OFC, 2022)

Novel Bidirectional Multicore EDFA Based on Twin Turbo Cladding Pumping Using Bidirectional Pumping and Recycling. - Hitoshi Takeshita; Yusuke Shimomura; Shoma Tateno; Kohei Hosokawa; Emmanuel Le Taillandier de Gabory (OECC/PSC, 2022)

Single Multicore-Fiber Bidirectional Spatial Channel Network Based on Spatial Cross-Connect and Multicore EDFA Efficiently Accommodating Asymmetric Traffic. - Kyosuke Nakada; Hitoshi Takeshita; Yuki Kuno; Yusuke Matsuno; Itsuki Urashima; Yusuke Shimomura; Yuji Hotta; Tsubasa Sasaki; Yudai Uchida; Kohei Hosokawa; Ryohei Otowa; Rika Tahara; et al. (OFC, 2023)

Technologies for Optical Submarine Cables: Past Present & Future. - Yuichi Nakamura 002; Hitoshi Takeshita (OFC, 2023)

Bidirectional single-multicore-fiber spatial channel network based on a spatial cross-connect and multicore EDFA that efficiently accommodates asymmetric data traffic. - Kyosuke Nakada; Hitoshi Takeshita; Yuki Kuno; Yusuke Matsuno; Itsuki Urashima; Yusuke Shimomura; Yuji Hotta; Tsubasa Sasaki; Yudai Uchida; Kohei Hosokawa; Ryohei Otowa; Rika Tahara; et al. (JOCN, 2023)

Transmission capacity expansion using bidirectional multicore EDFA under bidirectional signal assignment. - Hitoshi Takeshita; Yusuke Shimomura; Kohei Hosokawa (OFC, 2024)

Bidirectional 4-core MC-EDFA featuring integrated optical components and inter-core optical loopback function. - Hitoshi Takeshita; Yusuke Shimomura; Wakako Maeda (OFC, 2025)