Toshihiko Hirooka

Publication Activity (10 Years)

Years Active: 2006-2024
Publications (10 Years): 40

Top Topics

Wireless Transmission

Rapidly Changing

Supervised Feature Selection

Top Venues

IEICE Electron. Express

Publications

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka
Mode Division Multiplexed Coherent Optical Transmission in Time Domain by Using Higher-order Hermite-Gaussian Pulses. OFC (2024)
Masato Yoshida, Takaaki Hirai, Shohei Beppu, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa, Yuta Wakayama, Noboru Yoshikane
New GAWBS Noise Interacting with Longitudinally Propagating Acoustic Waves in Few-mode Fibers. OFC (2024)
Masato Yoshida, Kosuke Kimura, Toshihiko Hirooka, Keisuke Kasai, Masataka Nakazawa
Demodulation Performance Comparison of High-Speed Coherent Nyquist Pulse Signal with Analog and Digital Demultiplexing Schemes. IEICE Trans. Commun. 106 (11) (2023)
Aoi Watanabe, Aoto Ishikawa, Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa
10.2 Tbit/s (1.28 Tbit/s/ch x 8 ch) WDM Nyquist Pulse Transmission over 2100 km. OECC/PSC (2022)
Masato Yoshida, Kosuke Kimura, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa
Demodulation Performance Comparison of 160 Gbaud Coherent Nyquist Pulse Signal with Analog and Digital DEMUX Schemes. OECC/PSC (2022)
Kosuke Kimura, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa
Experimental and Numerical Analysis of Ultrahigh-Speed Coherent Nyquist Pulse Transmission with Low-Nonlinearity Dispersion Compensator. IEICE Trans. Commun. (9) (2022)
Masato Yoshida, Kozo Sato, Toshihiko Hirooka, Keisuke Kasai, Masataka Nakazawa
Precise Measurements and their Analysis of GAWBS-Induced Depolarization Noise in Multi-Core Fiber for Digital Coherent Transmission. IEICE Trans. Commun. (2) (2022)
Keisuke Kasai, Taisei Sato, Toshihiko Hirooka, Masato Yoshida, Masataka Nakazawa
64 Gbit/s, 256 QAM Transmission Through Coherent Optical-Wireless Link at 61 GHz Using Simple and High OSNR Carrier Frequency Converter. OFC (2021)
Takashi Kan, Keisuke Kasai, Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa
Broadband Dynamic Injection-Locking Performance of Fabry-Perot LD and Its Application to Coherent Homodyne Receiver. OFC (2021)
Kozo Sato, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa
GAWBS Noise Correlation Between Cores in Four-Core Fiber. OFC (2021)
Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka
Recent progress and challenges toward ultrahigh-speed transmission beyond 10 Tbit/s with optical Nyquist pulses. IEICE Electron. Express 18 (7) (2021)
Masato Yoshida, Takashi Kan, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa
10 Tbit/s QAM Quantum Noise Stream Cipher Coherent Transmission over 160 km. OFC (2020)
Keisuke Kasai, Toshihiko Hirooka, Masato Yoshida, Masataka Nakazawa
64 Gbit/s, 256 QAM Coherently-Linked Optical and Wireless Transmission in 61 GHz Band Using Novel Injection-Locked Carrier Frequency Converter. ECOC (2020)
Naoya Takefushi, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa
Experimental and Theoretical Analyses of GAWBS Phase Noise in Multi-Core Fiber for Digital Coherent Transmission. OFC (2020)
Naoya Takefushi, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa
GAWBS Noise Characteristics in Digital Coherent Transmission in Various Optical Fibers. OECC/PSC (2019)
Masato Yoshida, Takashi Kan, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa
Real-Time 256 QAM Bi-directional Coherent Transmission in Next Generation Mobile Fronthaul. OECC/PSC (2019)
Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa
Dual-Polarization On-Line 256 and 512 QAM Digital Coherent Transmission. OFC (2019)
Ryoya Hirata, Toshihiko Hirooka, Masato Yoshida, Masataka Nakazawa
Sub-Picosecond Optical Switch over Entire C-Band by Using Nonlinear Optical Loop Mirror. OECC/PSC (2019)
Ryoya Hirata, Toshihiko Hirooka, Masato Yoshida, Masataka Nakazawa
Wavelength-tunable sub-picosecond optical switch over entire C-band using nonlinear optical loop mirror. IEICE Electron. Express 16 (23) (2019)
Seiji Okamoto, Masaki Terayama, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa
Experimental and Numerical Comparison of Probabilistically-Shaped 4096 QAM and Uniformly-Shaped 1024 QAM in All-Raman Amplified 160 km Transmission. OFC (2018)
Masataka Nakazawa, Masaki Terayama, Seiji Okamoto, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka
Observation of Guided Acoustic-Wave Brillouin Scattering and its Digital Compensation in Coherent QAM Transmission. OFC (2018)
Keisuke Kasai, Masato Yoshida, Toshihiko Hirooka, Katsumi Iwatsuki, Masataka Nakazawa
Backward-Rayleigh-Scattering Suppressed 160 Gbit/s 256 QAM Injection-Locked Bidirectional Coherent Transmission for Next Generation Mobile Fronthaul. ECOC (2018)
Keisuke Kasai, Yixin Wang, Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa
Injection-locked Homodyne Detection for Higher-order QAM Transmission. OFC (2018)
Toshihiko Hirooka, Ryoya Hirata, Jianping Wang, Masato Yoshida, Masataka Nakazawa
Single-Channel 10.2 Tbit/s PDM-DQPSK Nyquist Pulse Transmission over 300 km. ECOC (2018)
Masato Yoshida, Junpei Nitta, Kosuke Kimura, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa
Single-channel 3.84 Tbit/s, 64 QAM coherent Nyquist pulse transmission over 150 km with frequency-stabilized and mode-locked laser. OFC (2017)
Koudai Harako, Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa
A 40 GHz, 770 fs regeneratively mode-locked erbium fiber laser operating at 1.6 µm. IEICE Electron. Express 14 (19) (2017)
Jun Yamamoto, Tamotsu Yajima, Yusuke Kinoshita, Futoshi Ishii, Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa
Fabrication of multi core fiber by using slurry casting method. OFC (2017)
Keisuke Kasai, Yixin Wang, Masato Yoshida, Toshihiko Hirooka, Katsumi Iwatsuki, Masataka Nakazawa
80 Gbit/s/ch, 256 QAM Digital Coherent Optical Transmission System with Injection-Locking for Next Generation Mobile Fronthaul Network. ECOC (2017)
Kosuke Kimura, Junpei Nitta, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa
A New Optical Phase-Locked System Between Ultrashort Pulses for 640 Gbaud Nyquist OTDM Coherent QAM Transmission. ECOC (2017)
Keisuke Kasai, Toshihiko Hirooka, Masato Yoshida, Masataka Nakazawa, Masaki Shiraiwa, Yoshinari Awaji, Naoya Wada
Single-carrier 552 Gbit/s, 46 Gbaud 64 QAM Coherent Transmission over 100 km with Co-propagating 10 Gbit/s-OOK Signals Through a Deployed ROADM Network. ECOC (2017)
Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa
Fused type fan-out device for multi-core fiber based on bundled structure. OFC (2016)
Tamotsu Yajima, Jun Yamamoto, Yusuke Kinoshita, Futoshi Ishii, Toshihiko Hirooka, Masato Yoshida, Masataka Nakazawa
Fabrication of OH-free, single-mode fiber by using slurry casting and rod-in-tube method. IEICE Electron. Express 13 (1) (2016)
Masatoshi Nakao, Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa
A 1.55 µm, 271 fs and 1.07 µm, 294 fs simultaneously mode-locked Er- and Yb-doped fiber laser with a single SWNT/PVA saturable absorber. IEICE Electron. Express 13 (14) (2016)
Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa
Mode coupling measurement at a splice point between few-mode fibers using a synchronous multi-channel OTDR. OFC (2016)
Toshihiko Hirooka, Keisuke Kasai, Yixin Wang, Masataka Nakazawa, Masaki Shiraiwa, Yoshinari Awaji, Naoya Wada
First demonstration of digital coherent transmission in a deployed ROADM network with a 120 Gbit/s polarization-multiplexed 64 QAM signal. IEICE Electron. Express 12 (23) (2015)
Masato Yoshida, Toshihiko Hirooka, Keisuke Kasai, Masataka Nakazawa
Real-time 10 Gbit/s-16 QAM quantum stream cipher transmission over 320 km with FPGA-based transmitter and receiver. OFC (2015)
Masato Yoshida, Toshihiko Hirooka, Keisuke Kasai, Masataka Nakazawa
Real-time adaptive 4-64 QAM, 20-60 Gbit/s quantum noise stream cipher transmission over 320 km with FPGA-based transmitter and receiver. ECOC (2015)
David Odeke Otuya, Koudai Harako, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa
Single-channel 1.92 Tbit/s, 64 QAM coherent orthogonal TDM transmission of 160 Gbaud optical Nyquist pulses with 10.6 bit/s/Hz spectral efficiency. OFC (2015)
Masato Yoshida, Toshihiko Hirooka, Keisuke Kasai, Masataka Nakazawa
QAM quantum noise stream cipher using digital coherent optical transmission. ACSSC (2015)
Toshikazu Sakano, Tetsuro Komukai, Atsushi Takahara, Toshihiko Hirooka, Masataka Nakazawa
Ad-hoc photonic network based on movable and deployable ICT resource unit to meet rapidly changing service demands. OFC (2015)
Tomokazu Kobayashi, Toshihiko Hirooka, Atsushi Hakotani, Ryuta Sato, Keiichi Shirase
Tool Motion Control Referring to Voxel Information of Removal Volume Voxel Model to Achieve Autonomous Milling Operation. Int. J. Autom. Technol. 8 (6) (2014)
Tetsuro Komukai, Hirokazu Kubota, Toshikazu Sakano, Toshihiko Hirooka, Masataka Nakazawa
Plug-and-Play Optical Interconnection Using Digital Coherent Technology for Resilient Network Based on Movable and Deployable ICT Resource Unit. IEICE Trans. Commun. (7) (2014)
Daiki Seya, Koudai Harako, Toshihiko Hirooka, Masataka Nakazawa
All-optical high-performance demultiplexing using optical Nyquist pulse sampling. OFC (2014)
David Odeke Otuya, Koudai Harako, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa
A single-channel 960 Gbit/s 64 QAM orthogonal TDM transmission with a spectral efficiency of 10.0 bit/s/Hz using coherent Nyquist pulses. ECOC (2014)
Tamotsu Yajima, Jun Yamamoto, Yusuke Kinoshita, Futoshi Ishii, Toshihiko Hirooka, Masato Yoshida, Masataka Nakazawa
OH-free low loss single-mode fibre fabricated by slurry casting / rod-in-tube method. ECOC (2014)
David Odeke Otuya, Keisuke Kasai, Toshihiko Hirooka, Masato Yoshida, Masataka Nakazawa
1.92 Tbit/s, 64 QAM coherent Nyquist pulse transmission over 150 km with a spectral efficiency of 7.5 bit/s/Hz. OFC (2014)
Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka
Measurement of mode coupling distribution along a few-mode fiber using a synchronous multi-channel OTDR. OFC (2014)
Masato Yoshida, Toshihiko Hirooka, Keisuke Kasai, Masataka Nakazawa
Real-time adaptive 4-64 QAM coherent optical transmission over 320 km with FPGA-based transmitter and receiver. ECOC (2014)
Toshihiko Hirooka, Masataka Nakazawa, Tetsuro Komukai, Toshikazu Sakano
100 Gbit/s DP-QPSK transmission over a 32 km legacy multi-mode GI fiber using a real-time digital coherent transceiver. OFC (2014)
Toshihiko Hirooka, Masataka Nakazawa, Tetsuro Komukai, Toshikazu Sakano
100 Gbit/s real-time digital coherent transmission over a 32 km legacy multi-mode graded-index fiber. IEICE Electron. Express 11 (15) (2014)
Koudai Harako, David Odeke Otuya, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa
Novel ultrafast TDM demultiplexing scheme using orthogonality in coherent Nyquist pulses. ECOC (2014)
David Odeke Otuya, Keisuke Kasai, Toshihiko Hirooka, Masato Yoshida, Masataka Nakazawa, Tokutaka Hara, Satoshi Oikawa
A single-channel, 1.6 Tbit/s 32 QAM coherent pulse transmission over 150 km with RZ-CW conversion and FDE techniques. OFC/NFOEC (2013)
Koudai Harako, Peng Ruan, Toshihiko Hirooka, Masataka Nakazawa
Large PMD tolerant 1.28 Tbit/s/ch transmission over 525 km with 640 Gbaud optical Nyquist pulses. OFC/NFOEC (2013)
Toshihiko Hirooka, Tomokazu Kobayashi, Atsushi Hakotani, Ryuta Sato, Keiichi Shirase
Surface Roughness Control Based on Digital Copy Milling Concept to Achieve Autonomous Milling Operation. Int. J. Autom. Technol. 7 (4) (2013)
Pengyu Guan, Hans Christian Hansen Mulvad, Yutaro Tomiyama, Toshiyuki Hirano, Toshihiko Hirooka, Masataka Nakazawa
Single-Channel 1.28 Tbit/s-525 km DQPSK Transmission Using Ultrafast Time-Domain Optical Fourier Transformation and Nonlinear Optical Loop Mirror. IEICE Trans. Commun. (2) (2011)
Kengo Koizumi, Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa
10Gbit/s photonic crystal fiber transmissions with 1.1µm directly-modulated single-mode VCSEL. IEICE Electron. Express 6 (22) (2009)
Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka
Ultra-Stable Regeneratively Mode-Locked Laser as an Opto-Electronic Microwave Oscillator and Its Application to Optical Metrology. IEICE Trans. Electron. (2) (2007)
Masataka Nakazawa, Toshihiko Hirooka
ABCD matrix formalism of time-domain optical Fourier transformation for distortion-free pulse transmission. IEICE Electron. Express 3 (4) (2006)
Hideaki Hasegawa, Yosuke Oikawa, Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa
10Gb/s transmission over 5km at 850nm using single-mode photonic crystal fiber, single-mode VCSEL, and Si-APD. IEICE Electron. Express 3 (6) (2006)
Toshihiko Hirooka, Takashi Kumakura, Kou Osawa, Masataka Nakazawa
Comparison of 40GHz optical demultiplexers using SMZ switch and EA modulator in 160Gbit/s-500km OTDM transmission. IEICE Electron. Express 3 (17) (2006)