Takahiro Kodama

According to our database, Takahiro Kodama authored at least 48 papers between 2013 and 2024.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of four.

2024

Double-link-failure-tolerant shared protection for fully coupled/half-split switchable point-to-multipoint coherent optical systems.

Takahiro Kodama, Tomoya Nakagawa, Shota Eguchi, Keiji Shimada, Ryosuke Matsumoto

J. Opt. Commun. Netw., 2024

Air/Water Path Switching with Beam Steering for Water Distance/Turbidity Adaptive Underwater Optical Wireless Communication Network: Concept and Demonstration.

Kiichiro Kuwahara, Hyuga Nagami, Keita Tanaka, Fumiya Kobori, Ayumu Kariya, Shogo Hayashida, Takahiro Kodama

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2024

Broadband Single Flat Narrow Beam Shaped Time-domain Adaptive Modulation for Underwater Transmission with Wavelength Characteristics in Blue-green WDM System.

Takahiro Kodama, Fumiya Kobori, Ayumu Kariya, Keita Tanaka, Kiichiro Kuwahara

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2024

Super Wide-Flat Beam Transmission over Scatter-prone Underwater Channel Using Twin Parallel Flat-Narrow Beams Generated by Aspheric Lens Pair-type Beam Shaper.

Tomoya Ishikawa, Ayumu Kariya, Fumiya Kobori, Keita Tanaka, Takahiro Kodama

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2024

2023

Kalman-Filter-Aided Dual-Band Collaborative Frequency Self-Tuning in Multiband Transceiver for P-to-MP System with Tight Passband Narrowing.

Keita Tanaka, Keiiji Shimada, Takahiro Kodama, Momoka Masaoka, Ken'ichi Fujimoto

Proceedings of the International Conference on Photonics in Switching and Computing, 2023

Secure Point-to-Multipoint Transmission with Access-Span Difference Using Phase Encryption and Power-Loaded IQ-Channel Multiplexing.

Keiiji Shimada, Ryosuke Matsumoto, Keita Tanaka, Takahiro Kodama

Proceedings of the International Conference on Photonics in Switching and Computing, 2023

2022

Experiment of Nationwide Multi-Route Skew Cancelling for Dynamic Mapping of MAC Signals over SDM/WDM Network Testbed.

Masaki Murakami, Yoshihiko Uematsu, Satoru Okamoto, Naoaki Yamanaka, Daiki Soma, Shohei Beppu, Noboru Yoshikane, Takehiro Tsuritani, Takahiro Kodama, Masahiko Jinno

Proceedings of the 2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC), 2022

All-optical MDM-OFDM System Using A Single MUX/DeMUX for Future Converged Optical Networks.

Takahiro Kodama, Gabriella Cincotti

Proceedings of the 2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC), 2022

First Demonstration of Hierarchical SDM/WDM 10-Mode-Fiber Ring Network with Spatial Bypass and Reconfigurable Spatial Add/Drop Multiplexing.

Takahiro Kodama, Shohei Beppu, Daiki Soma, Yuta Wakayama, Noboru Yoshikane, Masahiko Jinno, Takehiro Tsuritani

Proceedings of the 2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC), 2022

Inter Symbol Interference-tolerant Time-domain Hybrid PAM2/PAM4 Signal with Optimized Time Slot Arrangement.

Fumiya Kobori, Keita Tanaka, Takahiro Kodama

Proceedings of the 2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC), 2022

C-Band Downlink Coherent System Assisted TWDM-PON System with Type B Protection and Dual-DSP Collaborative SIMO.

Shota Eguchi, Tomoya Nakagawa, Mizuki Inagaki, Keiji Shimada, Takahiro Kodama

Proceedings of the 2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC), 2022

Polarization-independent Subtractive Interference Cancellation for Bidirectional Same-band Digital Coherent System.

Hidetoshi Amano, Mizuki Inagaki, Takahiro Kodama

Proceedings of the 2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC), 2022

Core Selective Switch Supporting 15 Cores Per Port Using Bundled Three 5-Core Fibers.

Yudai Uchida, Tsubasa Ishikawa, Itsuki Urashima, Shoma Murao, Takahiro Kodama, Yasuki Sakurai, Ryuichi Sugizaki, Masahiko Jinno

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2022

Any-Double-Link Failure Tolerant Bypass/Backup Switchable WDM-PON Employing Path-Pair Shared Protection and Bidirectional Wavelength Pre-assignment.

Takahiro Kodama, Tomoya Nakagawa, Ryosuke Matsumoto

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2022

2021

Global Optimization of Relay Placement for Seafloor Optical Wireless Networks.

Yoshiaki Inoue, Takahiro Kodama, Tomotaka Kimura

IEEE Trans. Wirel. Commun., 2021

Enhancing the flexibility and functionality of SCNs: demonstration of evolution toward any-core-access, nondirectional, and contentionless spatial channel cross-connects [Invited].

Masahiko Jinno, Tsubasa Ishikawa, Takahiro Kodama, Hiroshi Hasegawa, Suresh Subramaniam

JOCN, 2021

Technoeconomic analysis of spatial channel networks (SCNs): benefits from spatial bypass and spectral grooming [Invited].

Masahiko Jinno, Yu Asano, Yoshiki Azuma, Takahiro Kodama, Riku Nakai

JOCN, 2021

Time-Domain Hybrid PAM for Data-Rate and Distance Adaptive UWOC System.

Takahiro Kodama, Muhamad Aizat Bin Ahmad Sanusi, Fumiya Kobori, Tomotaka Kimura, Yoshiaki Inoue, Masahiko Jinno

CoRR, 2021

Comprehensive Analysis of Time-Domain Hybrid PAM for Data-Rate and Distance Adaptive UWOC System.

Takahiro Kodama, Muhamad Aizat Bin Ahmad Sanusi, Fumiya Kobori, Tomotaka Kimura, Yoshiaki Inoue, Masahiko Jinno

IEEE Access, 2021

Wavelength Collision-Free and Low-Loss Full-Duplex Transmission over Switchable Full-Coupling or Half-Split Coherent WDM-PON System with Shared Protection.

Takahiro Kodama, Tetsuji Goto, Ryosuke Matsumoto

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2021

Ultra-Wideband and Low-Loss Core Selective Switch Employing Two-Dimensionally Arranged MEMS Mirrors.

Masahiko Jinno, Itsuki Urashima, Tsubasa Ishikawa, Takahiro Kodama

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2021

2020

Fixed-Rate-Breaking All-Optical OFDM System using Time-Domain Hybrid PAM with Sparse Subcarrier Multiplexing and Power-Loading for Optical Short-Reach Transmission.

Takahiro Kodama, Akihiro Maruta, Naoya Wada, Gabriella Cincotti

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2020

Energy-Efficient Coherent PON System with Access-Span Length Difference between ONUs using Marginal IQ Power Loading in Downlink Transmission.

Takahiro Kodama, Kouki Arai

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2020

Five-Core 1×6 Core Selective Switch and Its Application to Spatial Channel Networking.

Masahiko Jinno, Takahiro Kodama, Tsubasa Ishikawa

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2020

Spatial Channel Network (SCN): Introducing Spatial Bypass toward the SDM Era.

Masahiko Jinno, Takahiro Kodama

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2020

Demonstration of Any-Care-Access Non-Directional Spatial Cross-Connects Based on Core Selective Switch with and without Core-Contention Constraint.

Takahiro Kodama, Tsubasa Ishikawa, Daiki Suzuki, Masahiko Jinno

Proceedings of the European Conference on Optical Communications, 2020

2019

Hybrid QAM-Based Labels Generated by Two Multi-Level PSK Codes.

Takahiro Kodama, Gabriella Cincotti

IEICE Trans. Commun., 2019

Over 1 Gbit/s NRZ-OOK Underwater Wireless Optical Transmission Experiment Using Wideband PMT.

Kazuhiko Nakamura, Kenichi Nagaoka, Daisuke Matsuo, Takahiro Kodama, Masanori Hanawa

Proceedings of the 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC), 2019

Underwater Wireless Optical Access Network with OFDM/SBMA System: Concept and Demonstration.

Takahiro Kodama, Koki Arai, Kota Nagata, Kazuhiko Nakamura, Masanori Hanawa

Proceedings of the 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC), 2019

SOP Independent Self-Homodyne Detection of Polarization Multiplexed QPSK Signal with AQPM Pilot Carrier.

Masanori Hanawa, Takahiro Kodama, Kazuhiko Nakamura

Proceedings of the 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC), 2019

Enhanced Optical Communications Through Joint Time-Frequency Multiplexing Strategies.

Tsuyoshi Konishi, Takuya Murakawa, Tomotaka Nagashima, Satoshi Shimizu, Makoto Hasegawa, Kuninori Hattori, Masayuki Okuno, Shinji Mino, Akira Himeno, Naoya Wada, Hiroyuki Uenohara, Takahiro Kodama, Gabriella Cincotti

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2019

Low-Speed DSP Assisted Dispersion Compensation-Free IM/DD Optical OFDM Transmission Over 100 km-SMF using Time- and Frequency-Domain Sparse-Subcarrier Multiplexing.

Takahiro Kodama, Tatsuya Miyazaki, Masanori Hanawa, Akihiro Maruta, Naoya Wada, Gabriella Cincotti

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2019

2018

Hybrid Opto-Electrical CDM-Based Access Network.

Takahiro Kodama, Gabriella Cincotti

IEICE Trans. Commun., 2018

Dispersion-induced IQ Imbalance Compensation Using an Electrical-domain Pre-FDE in QPSK Self-homodyne Transmission with AQPM Pilot-carrier.

Takahiro Kodama, Yamato Iwama, Masanori Hanawa

Proceedings of the Photonics in Switching and Computing, 2018

Multi-level QAM-based labels Generated by the Convolution of Optical and Electrical Codes.

Takahiro Kodama, Gabriella Cincotti

Proceedings of the Photonics in Switching and Computing, 2018

Seamless PAM-4 to QPSK Modulation Format Conversion at Gateway for Short-Reach and Long-Haul Integrated Networks.

Takahiro Kodama, Tatsuya Miyazaki, Masanori Hanawa

Proceedings of the European Conference on Optical Communication, 2018

2017

Demonstration of data-rate and power-budget adaptive 100 Gb/s/ A-based coherent PON downlink transmission.

Takahiro Kodama, Ryosuke Matsumoto, Naoki Suzuki

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2017

Simple frequency-domain hybrid-QAM superchannel with path-fitted pre-filtering and collaborative-subcarrier frequency self-tuning for flexible ROADM systems.

Takahiro Kodama, Masashi Binkai, Tsuyoshi Yoshida

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2017

Frequency-domain hybrid N × 100 Gb/s regular QAMs for simple, scalable, and transparent software-defined optical transport.

Masashi Binkai, Takahiro Kodama, Tsuyoshi Yoshida, Yuita Noguchi, Naoki Suzuki, Kuniaki Motoshima

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2017

2016

Nonlinear-Error-Free Optical Quantization Using Dense Spectral Slicing.

Takahiro Kodama, Ryosuke Matsumoto, Akihiro Maruta, Tsuyoshi Konishi, Ken-ichi Kitayama

IEICE Trans. Commun., 2016

2015

Flexible power-efficient Nyquist-OTDM transmitter, using a WSS and time-lens effect.

Gabriella Cincotti, Satoshi Shimizu, Takuya Murakawa, Takahiro Kodama, Kunihiro Hattori, Masayuki Okuno, Shinji Mino, Akira Himeno, Tomotaka Nagashima, Makoto Hasegawa, Naoya Wada, Hiroyuki Uenohara, Tsuyoshi Konishi

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2015

2014

Asynchronous MDM-OCDM-based 10G-PON over 40km-SMF and 2km-TMF using mode MUX/DeMUX at remote node and OLT.

Takahiro Kodama, Tomoki Isoda, Koji Morita, Akihiro Maruta, Ryo Maruyama, Nobuo Kuwaki, Shoichiro Matsuo, Naoya Wada, Gabriella Cincotti, Ken-ichi Kitayama

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2014

A novel optical quantization approach using spectral shifts of OFDM subcarriers and a frequency packed AWG.

Takahiro Kodama, Koji Morita, Gabriella Cincotti, Ken-ichi Kitayama

Proceedings of the European Conference on Optical Communication, 2014

2013

Scaling the System Capacity and Reach of a 10G-TDM-OCDM-PON System Without an En/Decoder at an ONU.

Takahiro Kodama, Yusuke Tanaka, Satoshi Yoshima, Nobuyuki Kataoka, Junichi Nakagawa, Satoshi Shimizu, Naoya Wada, Ken-ichi Kitayama

JOCN, 2013

Fixed-length elastic-capacity OFDM payload packet: Concept and demonstration.

Yuki Yoshida, Takahiro Kodama, Satoshi Shinada, Naoya Wada, Ken-ichi Kitayama

Proceedings of the 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC), 2013

Cost-effective, asynchronous 4 × 40Gbps full-duplex OCDMA demonstrator using apodized SSFBGs and a multi-port encoder/decoder.

Ryosuke Matsumoto, Takahiro Kodama, Satoshi Shimizu, Ryujiro Nomura, Koji Omichi, Naoya Wada, Ken-ichi Kitayama

Proceedings of the 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC), 2013

Highly-scalable, fully-asynchronous 16 ONUs, OCDM-based 10G-PON with a multiple access noise suppression at RN.

Takahiro Kodama, Naoya Wada, Gabriella Cincotti, Ken-ichi Kitayama

Proceedings of the 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC), 2013

Energy-efficient optical quantization scheme with orthogonal spectral slicing by AWG for OFDM.

Takahiro Kodama, Ryosuke Matsumoto, Akihiro Maruta, Ken-ichi Kitayama

Proceedings of the 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC), 2013