Takahiro Kodama

56 papers Misc 4Journal 13Unranked 39

Year	Rank	Type	Title / Venue / Authors
2026	J	`jnl`	Impact of physical layer attacks on phase-encrypted optical signals in coherent communication systems. Photonic Netw. Commun. Keiji Shimada, Takahiro Kodama
2025	—	`conf`	Bit-rate Adaptive Optical Attocell Networks with λ-Tunable Beam Steering Under Physical Impairments. OFC Takahiro Kodama, Kiichiro Kuwahara, Mikolaj Wolny, Eduward Tangdiongga
2025	—	`conf`	Demonstrating of Network Functionalities for Indoor Optical Wireless Attocell Networks: Handover and Multiplexing. ECOC Takahiro Kodama, Mikolaj Wolny, Eduward Tangdiongga
2025	J	`jnl`	Depth-Adaptive Air and Underwater Invisible Light Communication System with Aerial Reflection Repeater Assistance. Inf. Takahiro Kodama, Keita Tanaka, Kiichiro Kuwahara, Ayumu Kariya, Shogo Hayashida
2025	—	`conf`	Relay Node Placement Considering Age of Information for Seafloor Optical Wireless Networks. ICOIN Hayato Taniguchi, Nagisa Iwami, Tomotaka Kimura, Takahiro Kodama, Jun Cheng
2025	—	`conf`	Silicon Photonics-based Waveband Routing for Flexible Functional Splits. OFC Takahiro Kodama, Ryosuke Matsumoto, Kazuhiro Ikeda, Shu Namiki
2025	—	`conf`	Spectrum-Woven Flat-Narrow Twin Beams with Time-Domain Adaptation for Underwater Optical Wireless Communication. ECOC Kiichiro Kuwahara, Ayumu Kariya, Fumiya Kobori, Takahiro Kodama
2024	—	`conf`	Air/Water Path Switching with Beam Steering for Water Distance/Turbidity Adaptive Underwater Optical Wireless Communication Network: Concept and Demonstration. OFC Kiichiro Kuwahara, Hyuga Nagami, Keita Tanaka, Fumiya Kobori, Ayumu Kariya, Shogo Hayashida, Takahiro Kodama
2024	—	`conf`	Broadband Single Flat Narrow Beam Shaped Time-domain Adaptive Modulation for Underwater Transmission with Wavelength Characteristics in Blue-green WDM System. OFC Takahiro Kodama, Fumiya Kobori, Ayumu Kariya, Keita Tanaka, Kiichiro Kuwahara
2024	J	`jnl`	Double-link-failure-tolerant shared protection for fully coupled/half-split switchable point-to-multipoint coherent optical systems. J. Opt. Commun. Netw. Takahiro Kodama, Tomoya Nakagawa, Shota Eguchi, Keiji Shimada, Ryosuke Matsumoto
2024	—	`conf`	Super Wide-Flat Beam Transmission over Scatter-prone Underwater Channel Using Twin Parallel Flat-Narrow Beams Generated by Aspheric Lens Pair-type Beam Shaper. OFC Tomoya Ishikawa, Ayumu Kariya, Fumiya Kobori, Keita Tanaka, Takahiro Kodama
2023	Misc	`conf`	Kalman-Filter-Aided Dual-Band Collaborative Frequency Self-Tuning in Multiband Transceiver for P-to-MP System with Tight Passband Narrowing. PSC Keita Tanaka, Keiiji Shimada, Takahiro Kodama, Momoka Masaoka, Ken'ichi Fujimoto
2023	Misc	`conf`	Secure Point-to-Multipoint Transmission with Access-Span Difference Using Phase Encryption and Power-Loaded IQ-Channel Multiplexing. PSC Keiiji Shimada, Ryosuke Matsumoto, Keita Tanaka, Takahiro Kodama
2022	—	`conf`	All-optical MDM-OFDM System Using A Single MUX/DeMUX for Future Converged Optical Networks. OECC/PSC Takahiro Kodama, Gabriella Cincotti
2022	—	`conf`	Any-Double-Link Failure Tolerant Bypass/Backup Switchable WDM-PON Employing Path-Pair Shared Protection and Bidirectional Wavelength Pre-assignment. OFC Takahiro Kodama, Tomoya Nakagawa, Ryosuke Matsumoto
2022	—	`conf`	C-Band Downlink Coherent System Assisted TWDM-PON System with Type B Protection and Dual-DSP Collaborative SIMO. OECC/PSC Shota Eguchi, Tomoya Nakagawa, Mizuki Inagaki, Keiji Shimada, Takahiro Kodama
2022	—	`conf`	Core Selective Switch Supporting 15 Cores Per Port Using Bundled Three 5-Core Fibers. OFC Yudai Uchida, Tsubasa Ishikawa, Itsuki Urashima, Shoma Murao, Takahiro Kodama, Yasuki Sakurai, Ryuichi Sugizaki, Masahiko Jinno
2022	—	`conf`	Experiment of Nationwide Multi-Route Skew Cancelling for Dynamic Mapping of MAC Signals over SDM/WDM Network Testbed. OECC/PSC Masaki Murakami, Yoshihiko Uematsu, Satoru Okamoto, Naoaki Yamanaka, Daiki Soma, Shohei Beppu, Noboru Yoshikane, Takehiro Tsuritani, Takahiro Kodama, Masahiko Jinno
2022	—	`conf`	First Demonstration of Hierarchical SDM/WDM 10-Mode-Fiber Ring Network with Spatial Bypass and Reconfigurable Spatial Add/Drop Multiplexing. OECC/PSC Takahiro Kodama, Shohei Beppu, Daiki Soma, Yuta Wakayama, Noboru Yoshikane, Masahiko Jinno, Takehiro Tsuritani
2022	—	`conf`	Inter Symbol Interference-tolerant Time-domain Hybrid PAM2/PAM4 Signal with Optimized Time Slot Arrangement. OECC/PSC Fumiya Kobori, Keita Tanaka, Takahiro Kodama
2022	—	`conf`	Polarization-independent Subtractive Interference Cancellation for Bidirectional Same-band Digital Coherent System. OECC/PSC Hidetoshi Amano, Mizuki Inagaki, Takahiro Kodama
2021	J	`jnl`	Comprehensive Analysis of Time-Domain Hybrid PAM for Data-Rate and Distance Adaptive UWOC System. IEEE Access Takahiro Kodama, Muhamad Aizat Bin Ahmad Sanusi, Fumiya Kobori, Tomotaka Kimura, Yoshiaki Inoue, Masahiko Jinno
2021	J	`jnl`	Enhancing the flexibility and functionality of SCNs: demonstration of evolution toward any-core-access, nondirectional, and contentionless spatial channel cross-connects [Invited]. JOCN Masahiko Jinno, Tsubasa Ishikawa, Takahiro Kodama, Hiroshi Hasegawa, Suresh Subramaniam
2021	J	`jnl`	Global Optimization of Relay Placement for Seafloor Optical Wireless Networks. IEEE Trans. Wirel. Commun. Yoshiaki Inoue, Takahiro Kodama, Tomotaka Kimura
2021	J	`jnl`	Technoeconomic analysis of spatial channel networks (SCNs): benefits from spatial bypass and spectral grooming [Invited]. JOCN Masahiko Jinno, Yu Asano, Yoshiki Azuma, Takahiro Kodama, Riku Nakai
2021	J	`jnl`	Time-Domain Hybrid PAM for Data-Rate and Distance Adaptive UWOC System. CoRR Takahiro Kodama, Muhamad Aizat Bin Ahmad Sanusi, Fumiya Kobori, Tomotaka Kimura, Yoshiaki Inoue, Masahiko Jinno
2021	—	`conf`	Ultra-Wideband and Low-Loss Core Selective Switch Employing Two-Dimensionally Arranged MEMS Mirrors. OFC Masahiko Jinno, Itsuki Urashima, Tsubasa Ishikawa, Takahiro Kodama
2021	—	`conf`	Wavelength Collision-Free and Low-Loss Full-Duplex Transmission over Switchable Full-Coupling or Half-Split Coherent WDM-PON System with Shared Protection. OFC Takahiro Kodama, Tetsuji Goto, Ryosuke Matsumoto
2020	—	`conf`	Demonstration of Any-Care-Access Non-Directional Spatial Cross-Connects Based on Core Selective Switch with and without Core-Contention Constraint. ECOC Takahiro Kodama, Tsubasa Ishikawa, Daiki Suzuki, Masahiko Jinno
2020	—	`conf`	Energy-Efficient Coherent PON System with Access-Span Length Difference between ONUs using Marginal IQ Power Loading in Downlink Transmission. OFC Takahiro Kodama, Kouki Arai
2020	—	`conf`	Five-Core 1×6 Core Selective Switch and Its Application to Spatial Channel Networking. OFC Masahiko Jinno, Takahiro Kodama, Tsubasa Ishikawa
2020	—	`conf`	Fixed-Rate-Breaking All-Optical OFDM System using Time-Domain Hybrid PAM with Sparse Subcarrier Multiplexing and Power-Loading for Optical Short-Reach Transmission. OFC Takahiro Kodama, Akihiro Maruta, Naoya Wada, Gabriella Cincotti
2020	J	`jnl`	Global Optimization of Relay Placement for Seafloor Optical Wireless Networks. CoRR Yoshiaki Inoue, Takahiro Kodama, Tomotaka Kimura
2020	—	`conf`	Spatial Channel Network (SCN): Introducing Spatial Bypass toward the SDM Era. OFC Masahiko Jinno, Takahiro Kodama
2019	—	`conf`	Enhanced Optical Communications Through Joint Time-Frequency Multiplexing Strategies. OFC 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
2019	J	`jnl`	Hybrid QAM-Based Labels Generated by Two Multi-Level PSK Codes. IEICE Trans. Commun. Takahiro Kodama, Gabriella Cincotti
2019	—	`conf`	Low-Speed DSP Assisted Dispersion Compensation-Free IM/DD Optical OFDM Transmission Over 100 km-SMF using Time- and Frequency-Domain Sparse-Subcarrier Multiplexing. OFC Takahiro Kodama, Tatsuya Miyazaki, Masanori Hanawa, Akihiro Maruta, Naoya Wada, Gabriella Cincotti
2019	—	`conf`	Over 1 Gbit/s NRZ-OOK Underwater Wireless Optical Transmission Experiment Using Wideband PMT. OECC/PSC Kazuhiko Nakamura, Kenichi Nagaoka, Daisuke Matsuo, Takahiro Kodama, Masanori Hanawa
2019	—	`conf`	SOP Independent Self-Homodyne Detection of Polarization Multiplexed QPSK Signal with AQPM Pilot Carrier. OECC/PSC Masanori Hanawa, Takahiro Kodama, Kazuhiko Nakamura
2019	—	`conf`	Underwater Wireless Optical Access Network with OFDM/SBMA System: Concept and Demonstration. OECC/PSC Takahiro Kodama, Koki Arai, Kota Nagata, Kazuhiko Nakamura, Masanori Hanawa
2018	Misc	`conf`	Dispersion-induced IQ Imbalance Compensation Using an Electrical-domain Pre-FDE in QPSK Self-homodyne Transmission with AQPM Pilot-carrier. PSC Takahiro Kodama, Yamato Iwama, Masanori Hanawa
2018	J	`jnl`	Hybrid Opto-Electrical CDM-Based Access Network. IEICE Trans. Commun. Takahiro Kodama, Gabriella Cincotti
2018	Misc	`conf`	Multi-level QAM-based labels Generated by the Convolution of Optical and Electrical Codes. PSC Takahiro Kodama, Gabriella Cincotti
2018	—	`conf`	Seamless PAM-4 to QPSK Modulation Format Conversion at Gateway for Short-Reach and Long-Haul Integrated Networks. ECOC Takahiro Kodama, Tatsuya Miyazaki, Masanori Hanawa
2017	—	`conf`	Demonstration of data-rate and power-budget adaptive 100 Gb/s/ A-based coherent PON downlink transmission. OFC Takahiro Kodama, Ryosuke Matsumoto, Naoki Suzuki
2017	—	`conf`	Frequency-domain hybrid N × 100 Gb/s regular QAMs for simple, scalable, and transparent software-defined optical transport. OFC Masashi Binkai, Takahiro Kodama, Tsuyoshi Yoshida, Yuita Noguchi, Naoki Suzuki, Kuniaki Motoshima
2017	—	`conf`	Simple frequency-domain hybrid-QAM superchannel with path-fitted pre-filtering and collaborative-subcarrier frequency self-tuning for flexible ROADM systems. OFC Takahiro Kodama, Masashi Binkai, Tsuyoshi Yoshida
2016	J	`jnl`	Nonlinear-Error-Free Optical Quantization Using Dense Spectral Slicing. IEICE Trans. Commun. Takahiro Kodama, Ryosuke Matsumoto, Akihiro Maruta, Tsuyoshi Konishi, Ken-ichi Kitayama
2015	—	`conf`	Flexible power-efficient Nyquist-OTDM transmitter, using a WSS and time-lens effect. OFC 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
2014	—	`conf`	A novel optical quantization approach using spectral shifts of OFDM subcarriers and a frequency packed AWG. ECOC Takahiro Kodama, Koji Morita, Gabriella Cincotti, Ken-ichi Kitayama
2014	—	`conf`	Asynchronous MDM-OCDM-based 10G-PON over 40km-SMF and 2km-TMF using mode MUX/DeMUX at remote node and OLT. OFC Takahiro Kodama, Tomoki Isoda, Koji Morita, Akihiro Maruta, Ryo Maruyama, Nobuo Kuwaki, Shoichiro Matsuo, Naoya Wada, Gabriella Cincotti, Ken-ichi Kitayama
2013	—	`conf`	Cost-effective, asynchronous 4 × 40Gbps full-duplex OCDMA demonstrator using apodized SSFBGs and a multi-port encoder/decoder. OFC/NFOEC Ryosuke Matsumoto, Takahiro Kodama, Satoshi Shimizu, Ryujiro Nomura, Koji Omichi, Naoya Wada, Ken-ichi Kitayama
2013	—	`conf`	Energy-efficient optical quantization scheme with orthogonal spectral slicing by AWG for OFDM. OFC/NFOEC Takahiro Kodama, Ryosuke Matsumoto, Akihiro Maruta, Ken-ichi Kitayama
2013	—	`conf`	Fixed-length elastic-capacity OFDM payload packet: Concept and demonstration. OFC/NFOEC Yuki Yoshida, Takahiro Kodama, Satoshi Shinada, Naoya Wada, Ken-ichi Kitayama
2013	—	`conf`	Highly-scalable, fully-asynchronous 16 ONUs, OCDM-based 10G-PON with a multiple access noise suppression at RN. OFC/NFOEC Takahiro Kodama, Naoya Wada, Gabriella Cincotti, Ken-ichi Kitayama
2013	J	`jnl`	Scaling the System Capacity and Reach of a 10G-TDM-OCDM-PON System Without an En/Decoder at an ONU. JOCN Takahiro Kodama, Yusuke Tanaka, Satoshi Yoshima, Nobuyuki Kataoka, Junichi Nakagawa, Satoshi Shimizu, Naoya Wada, Ken-ichi Kitayama