Toshihiko Hirooka

发表

QAM quantum noise stream cipher using digital coherent optical transmission

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2015, 2015 49th Asilomar Conference on Signals, Systems and Computers.

Fused type fan-out device for multi-core fiber based on bundled structure

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2016, 2016 Optical Fiber Communications Conference and Exhibition (OFC).

Optical and wireless-integrated next-generation access network based on coherent technologies

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2016, SPIE OPTO.

Single-Channel 10.2 Tbit/s PDM-DQPSK Nyquist Pulse Transmission over 300 km

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2018, 2018 European Conference on Optical Communication (ECOC).

GAWBS Noise Characteristics in Digital Coherent Transmission in Various Optical Fibers

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2019, 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC).

Experimental and Theoretical Analyses of GAWBS Phase Noise in Multi-Core Fiber for Digital Coherent Transmission

Masataka Nakazawa, Toshihiko Hirooka, Keisuke Kasai, 2020, 2020 Optical Fiber Communications Conference and Exhibition (OFC).

Surface Roughness Control Based on Digital Copy Milling Concept to Achieve Autonomous Milling Operation

Ryuta Sato, Keiichi Shirase, Atsushi Hakotani, 2012 .

Plug-and-Play Optical Interconnection Using Digital Coherent Technology for Resilient Network Based on Movable and Deployable ICT Resource Unit

Hirokazu Kubota, Masataka Nakazawa, Toshihiko Hirooka, 2014, IEICE transactions on communications.

Measurement of mode coupling distribution along a few-mode fiber using a synchronous multi-channel OTDR

Masataka Nakazawa, Toshihiko Hirooka, Masato Yoshida, 2014, OFC.

A Single-Channel 40 Gbit/s Digital Coherent QAM Quantum Stream Cipher Transmission over 480 km

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2014, 2014 Asia Communications and Photonics Conference (ACP).

Dynamic optical transport connection with a 100 Gbit/s digital coherent optical transponder for disaster-resilient networking

Hirokazu Kubota, Masataka Nakazawa, Toshihiko Hirooka, 2013, 2013 IEEE Region 10 Humanitarian Technology Conference.

First demonstration of digital coherent transmission in a deployed ROADM network with a 120 Gbit/s polarization-multiplexed 64 QAM signal

Naoya Wada, Yoshinari Awaji, Masaki Shiraiwa, 2015, IEICE Electron. Express.

10 Gbit/s photonic crystal fiber transmissions with 1.1 μm directly-modulated single-mode VCSEL

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2010, 2010 Conference on Optical Fiber Communication (OFC/NFOEC), collocated National Fiber Optic Engineers Conference.

Demonstration of on-line bi-directional 10-RRHS with an 80 GBIT/S/RRH capacity using 256 QAM WDM coherent transmission for next generation mobile fronthaul

Masataka Nakazawa, Toshihiko Hirooka, Keisuke Kasai, 2019 .

Wavelength-tunable sub-picosecond optical switch over entire C-band using nonlinear optical loop mirror

Masataka Nakazawa, Masataka Nakazawa, Masato Yoshida, 2019, IEICE Electron. Express.

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

Naoya Wada, Yoshinari Awaji, Masaki Shiraiwa, 2017, 2017 European Conference on Optical Communication (ECOC).

Marked performance improvement of 256 QAM transmission using a digital back-propagation method.

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2012, Optics express.

Digital Coherent Optical Access Technologies for Beyond 5G Network

Katsumi Iwatsuki, Masataka Nakazawa, Masato Yoshida, 2020, 2020 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT).

Surface Roughness Control Based on Digital Copy Milling Concept to Achieve Autonomous Milling Operation

Ryuta Sato, Keiichi Shirase, Tomokazu Kobayashi, 2013, Int. J. Autom. Technol..

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

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2016, IEICE Electron. Express.

A New Optical Phase-Locked System Between Ultrashort Pulses for 640 Gbaud Nyquist OTDM Coherent QAM Transmission

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2017, 2017 European Conference on Optical Communication (ECOC).

Real-time 10 Gbit/s-16 QAM quantum stream cipher transmission over 320 km with FPGA-based transmitter and receiver

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

Sub-Picosecond Optical Switch over Entire C-Band by Using Nonlinear Optical Loop Mirror

ABCD matrix formalism of time-domain optical Fourier transformation for distortion-free pulse transmission

Masataka Nakazawa, Toshihiko Hirooka, 2006, IEICE Electron. Express.

A 40 GHz, 770 fs regeneratively mode-locked erbium fiber laser operating at 1.6 µm

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2017, IEICE Electron. Express.

Single-channel 3.84 Tbit/s, 64 QAM coherent Nyquist pulse transmission over 150 km with frequency-stabilized and mode-locked laser

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2017, 2017 Optical Fiber Communications Conference and Exhibition (OFC).

1.92 Tbit/s, 64 QAM coherent Nyquist pulse transmission over 150 km with a spectral efficiency of 7.5 bit/s/Hz

Masataka Nakazawa, Toshihiko Hirooka, Keisuke Kasai, 2014, OFC 2014.

10 Gb/s transmission over 3 km at 850 nm using single-mode photonic crystal fiber, single-mode VCSEL, and Si-APD

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2006, 2006 Optical Fiber Communication Conference and the National Fiber Optic Engineers Conference.

Fabrication of multi core fiber by using slurry casting method

Jun Yamamoto, Masataka Nakazawa, Masato Yoshida, 2017, 2017 Optical Fiber Communications Conference and Exhibition (OFC).

Resilient photonic network architecture with plug & play optical interconnection technology

Hirokazu Kubota, Masataka Nakazawa, Toshihiko Hirooka, 2013, 2013 18th OptoElectronics and Communications Conference held jointly with 2013 International Conference on Photonics in Switching (OECC/PS).

Real-time adaptive 4–64 QAM coherent optical transmission over 320 km with FPGA-based transmitter and receiver

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2014, 2014 The European Conference on Optical Communication (ECOC).

QAM Quantum Noise Stream Cipher Transmission Over 100 km With Continuous Variable Quantum Key Distribution

Ryo Namiki, Masato Yoshida, Toshihiko Hirooka, 2017, IEEE Journal of Quantum Electronics.

Q margin comparison of RZ and Nyquist optical pulses in ultrahigh-speed TDM transmission

Masataka Nakazawa, Toshihiko Hirooka, Lei Chen, 2014, 2014 OptoElectronics and Communication Conference and Australian Conference on Optical Fibre Technology.

Observation of Guided Acoustic-Wave Brillouin Scattering and its Digital Compensation in Coherent QAM Transmission

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2018, 2018 Optical Fiber Communications Conference and Exposition (OFC).

100 Gbit/s DP-QPSK transmission over a 32 km legacy multi-mode GI fiber using a real-time digital coherent transceiver

Masataka Nakazawa, Toshihiko Hirooka, Toshikazu Sakano, 2014, OFC.

Dual-Polarization On-Line 256 and 512 QAM Digital Coherent Transmission

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2019, 2019 Optical Fiber Communications Conference and Exhibition (OFC).

Real-time adaptive 4–64 QAM, 20–60 Gbit/s quantum noise stream cipher transmission over 320 km with FPGA-based transmitter and receiver

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2015, 2015 European Conference on Optical Communication (ECOC).

Backward-Rayleigh-Scattering Suppressed 160 Gbit/s 256 QAM Injection-Locked Bidirectional Coherent Transmission for Next Generation Mobile Fronthaul

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2018, 2018 European Conference on Optical Communication (ECOC).

QAM quantum stream cipher using digital coherent optical transmission.

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2014, Optics express.

80 Gbit/s/ch, 256 QAM Digital Coherent Optical Transmission System with Injection-Locking for Next Generation Mobile Fronthaul Network

Katsumi Iwatsuki, Masataka Nakazawa, Masato Yoshida, 2017, 2017 European Conference on Optical Communication (ECOC).

Novel RZ-CW conversion scheme for ultra multi-level, high-speed coherent OTDM transmission

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2011, 2011 37th European Conference and Exhibition on Optical Communication.

100 Gbit/s DP-QPSK transmission over a 32 km legacy multi-mode GI fiber using a real-time digital coherent transceiver

Masataka Nakazawa, Toshihiko Hirooka, Toshikazu Sakano, 2014, OFC 2014.

Ad-hoc photonic network based on movable and deployable ICT resource unit to meet rapidly changing service demands

Atsushi Takahara, Masataka Nakazawa, Toshihiko Hirooka, 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

100 Gbit/s real-time digital coherent transmission over a 32 km legacy multi-mode graded-index fiber

Masataka Nakazawa, Toshihiko Hirooka, Toshikazu Sakano, 2014, IEICE Electron. Express.

TK-3-7 Optical Transmission Technologies for Enhancing the Resilience of Information and Communication Networks

Noboru Yoshikane, Takehiro Tsuritani, Masataka Nakazawa, 2013 .

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

Masataka Nakazawa, Toshihiko Hirooka, Keisuke Kasai, 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

Single-Channel 1.28 Tbit/s-525 km DQPSK Transmission Using Ultrafast Time-Domain Optical Fourier Transformation and Nonlinear Optical Loop Mirror

Toshiyuki Hirano, Hans Christian Hansen Mulvad, Masataka Nakazawa, 2011, IEICE Trans. Commun..

Comparison of 40GHz optical demultiplexers using SMZ switch and EA modulator in 160Gbit/s-500km OTDM transmission

Masataka Nakazawa, Toshihiko Hirooka, Takashi Kumakura, 2006, IEICE Electron. Express.

10 Tbit/s QAM Quantum Noise Stream Cipher Coherent Transmission over 160 km

Masataka Nakazawa, Toshihiko Hirooka, Keisuke Kasai, 2020, 2020 Optical Fiber Communications Conference and Exhibition (OFC).

Mode coupling measurement at a splice point between few-mode fibers using a synchronous multi-channel OTDR

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2016, 2016 Optical Fiber Communications Conference and Exhibition (OFC).

Fabrication of OH-free, single-mode fiber by using slurry casting and rod-in-tube method

Jun Yamamoto, Masataka Nakazawa, Masato Yoshida, 2016, IEICE Electron. Express.

Injection-locked Homodyne Detection for Higher-order QAM Transmission

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2018, 2018 Optical Fiber Communications Conference and Exposition (OFC).

Tool Motion Control Referring to Voxel Information of Removal Volume Voxel Model to Achieve Autonomous Milling Operation

Ryuta Sato, Keiichi Shirase, Tomokazu Kobayashi, 2014, Int. J. Autom. Technol..

512 QAM transmission over 240 km using frequency-domain equalization in a digital coherent receiver.

Masataka Nakazawa, Toshihiko Hirooka, Masato Yoshida, 2012, Optics express.

Adaptive 4~64 QAM real-time coherent optical transmission over 320 km with FPGA-based transmitter and receiver.

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2014, Optics express.

All-optical high-performance demultiplexing using optical Nyquist pulse sampling

Masataka Nakazawa, Toshihiko Hirooka, Koudai Harako, 2014, OFC.

Ultra-Stable Regeneratively Mode-Locked Laser as an Opto-Electronic Microwave Oscillator and Its Application to Optical Metrology

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2007, IEICE Trans. Electron..

10 Tbit/s QAM Quantum Noise Stream Cipher Coherent Transmission Over 160 Km

Masataka Nakazawa, Toshihiko Hirooka, Keisuke Kasai, 2020, Journal of Lightwave Technology.

Experimental and Numerical Comparison of Probabilistically-Shaped 4096 QAM and Uniformly-Shaped 1024 QAM in All-Raman Amplified 160 km Transmission

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2018, 2018 Optical Fiber Communications Conference and Exposition (OFC).

Real-Time 256 QAM Bi-directional Coherent Transmission in Next Generation Mobile Fronthaul

GAWBS Noise Correlation Between Cores in Four-Core Fiber

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2021, 2021 Optical Fiber Communications Conference and Exhibition (OFC).

64 Gbit/s, 256 QAM Transmission Through Coherent Optical-Wireless Link at 61 GHz Using Simple and High OSNR Carrier Frequency Converter

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2021, 2021 Optical Fiber Communications Conference and Exhibition (OFC).

Broadband Dynamic Injection-Locking Performance of Fabry-Perot LD and Its Application to Coherent Homodyne Receiver

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2021, 2021 Optical Fiber Communications Conference and Exhibition (OFC).

Low-loss and reflection-free fused type fan-out device for 7-core fiber based on a bundled structure.

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2017, Optics express.

Highly dispersion-tolerant 160 Gbaud optical Nyquist pulse TDM transmission over 525 km.

Masataka Nakazawa, Toshihiko Hirooka, Peng Ruan, 2012, Optics express.

Parabolic pulse generation by use of a dispersion-decreasing fiber with normal group-velocity dispersion.

Masataka Nakazawa, Toshihiko Hirooka, M. Nakazawa, 2004, Optics letters.

640 Gbit/s single-polarization DPSK transmission over 525 km with time-domain optical Fourier transformation in a round-trip configuration

Masataka Nakazawa, Toshihiko Hirooka, M. Nakazawa, 2010, 2010 Conference on Optical Fiber Communication (OFC/NFOEC), collocated National Fiber Optic Engineers Conference.

1024 QAM, 7-core (60 Gbit/s x 7) fiber transmission over 55 km with an aggregate potential spectral efficiency of 109 bit/s/Hz.

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2015, Optics express.

A mode locking theory of the nyquist laser

Masataka Nakazawa, Toshihiko Hirooka, 2016, 2016 Conference on Lasers and Electro-Optics (CLEO).

Roll-off factor dependence of Nyquist pulse transmission.

Masataka Nakazawa, Toshihiko Hirooka, Daiki Suzuki, 2016, Optics express.

Higher-order asymptotic analysis of dispersion-managed transmission systems: solutions and their characteristics

Takashi Inoue, Toshihiko Hirooka, Mark J. Ablowitz, 2002 .

Nonlinear Gain Control of Dispersion-Managed Soliton Amplitude and Collisions

Toshihiko Hirooka, Stefan Wabnitz, 2000 .

The Nyquist laser

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2014 .

160 Gbit/s-600 km OTDM Transmission Using Time-domain Optical Fourier Transformation

Masataka Nakazawa, Toshihiko Hirooka, Kou Osawa, 2006, 2006 European Conference on Optical Communications.

Single-channel 3.84 Tbit/s, 64 QAM coherent Nyquist pulse transmission over 150 km with a spectral efficiency of 10.6 bit/s/Hz.

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2014, Optics express.

Linear and nonlinear propagation of optical Nyquist pulses in fibers.

Masataka Nakazawa, Toshihiko Hirooka, M. Nakazawa, 2012, Optics express.

Resonant intrachannel pulse interactions in dispersion-managed transmission systems

Toshihiko Hirooka, Mark J. Ablowitz, M. Ablowitz, 2002 .

1.28 Tbit/s/channel single-polarization DQPSK transmission over 525 km using ultrafast time-domain optical fourier transformation

Masataka Nakazawa, Toshihiko Hirooka, Yutaro Tomiyama, 2010, 36th European Conference and Exhibition on Optical Communication.

2.56 Tbit/s/ch polarization-multiplexed DQPSK transmission over 300 km using time-domain optical fourier transformation

Masataka Nakazawa, Toshihiko Hirooka, Koudai Harako, 2011, 2011 37th European Conference and Exhibition on Optical Communication.

Single-channel 10.2 Tbit/s (2.56 Tbaud) optical Nyquist pulse transmission over 300 km.

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2018, Optics express.

Incomplete collisions in strongly dispersion-managed return-to-zero communication systems.

Toshihiko Hirooka, Andrew Docherty, Mark J Ablowitz, 2003, Optics letters.

Reverse Phase Modulation Technique for GAWBS Noise Error Floor Elimination in 1024 QAM-160 km Digital Coherent Transmission

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2018, 2018 23rd Opto-Electronics and Communications Conference (OECC).

Timing and amplitude jitter due to intra-channel dispersion-managed pulse interactions

Toshihiko Hirooka, Mark J. Ablowitz, 2002 .

Polymer saturable absorber materials in the 1.5 microm band using poly-methyl-methacrylate and polystyrene with single-wall carbon nanotubes and their application to a femtosecond laser.

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2006, Optics letters.

Ultrafast Nyquist OTDM demultiplexing using optical Nyquist pulse sampling in an all-optical nonlinear switch.

Masataka Nakazawa, Toshihiko Hirooka, Daiki Suzuki, 2015, Optics express.

OH-free low loss single-mode fibre fabricated by slurry casting / rod-in-tube method

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2014, 2014 The European Conference on Optical Communication (ECOC).

A 10 GHz 2.5 ps regeneratively mode-locked Yb fiber laser in the 1.1 μm band

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2011, CLEO: 2011 - Laser Science to Photonic Applications.

Intrachannel pulse interactions in dispersion-managed transmission systems: energy transfer.

Toshihiko Hirooka, M. Ablowitz, T. Hirooka, 2002, Optics letters.

Collision-induced timing shifts in dispersion-managed soliton systems.

Anjan Biswas, Gino Biondini, Toshihiko Hirooka, 2002, Optics letters.

GAWBS Noise Characteristics in Digital Coherent Transmission in Various Optical Fibers

Measurement of mode coupling distribution along a few-mode fiber using a synchronous multi-channel OTDR

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2014, OFC 2014.

Measurement of mode coupling distribution along a few-mode fiber using a synchronous multi-channel OTDR

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2014, OFC.

640 Gbaud (1.28 Tbit/s/ch) optical Nyquist pulse transmission over 525 km with substantial PMD tolerance.

Masataka Nakazawa, Toshihiko Hirooka, Koudai Harako, 2013, Optics express.

Detailed comparison between mode couplings along multi-core fibers and structural irregularities using a synchronous multi-channel OTDR system with a high dynamic range.

Ryuichi Sugizaki, Masataka Nakazawa, Masato Yoshida, 2013, Optics express.

Managing nonlinearity in strongly dispersion-managed optical pulse transmission

Toshihiko Hirooka, Mark J. Ablowitz, M. Ablowitz, 2002 .

Ultrahigh-speed "orthogonal" TDM transmission with an optical Nyquist pulse train.

Masataka Nakazawa, Toshihiko Hirooka, Peng Ruan, 2012, Optics express.

Managing nonlinearity in strongly dispersion-managed optical pulse transmission

Toshihiko Hirooka, Mark J. Ablowitz, 2002 .

Single-channel 400 Gbit/s, OTDM-32 RZ/QAM coherent transmission over 225 km using an optical phase-locked loop technique

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2010, 2010 Conference on Optical Fiber Communication (OFC/NFOEC), collocated National Fiber Optic Engineers Conference.

High-performance TDM demultiplexing of coherent Nyquist pulses using time-domain orthogonality.

Masataka Nakazawa, Toshihiko Hirooka, Keisuke Kasai, 2014, Optics express.

10 Gb/s transmission over 3 km at 850 nm using single-mode photonic crystal fiber, single-mode VCSEL, and Si-APD

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2006 .

All-Optical 40-GHz Time-Domain Fourier Transformation Using XPM With a Dark Parabolic Pulse

Masataka Nakazawa, Toshihiko Hirooka, M. Nakazawa, 2008, IEEE Photonics Technology Letters.

All-Optical 40-GHz Time-Domain Fourier Transformation Using XPM With a Dark Parabolic Pulse

Masataka Nakazawa, Toshihiko Hirooka, 2008 .

Nondestructive measurement of mode couplings along a multi-core fiber using a synchronous multi-channel OTDR.

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2012, Optics express.

Distortion-free optical transmission using time-domain optical Fourier transformation and transform-limited optical pulses

Masataka Nakazawa, Toshihiko Hirooka, M. Nakazawa, 2005 .

Single-channel 1.92 Tbit/s, Pol-Mux-64 QAM coherent Nyquist pulse transmission over 150 km with a spectral efficiency of 7.5 bit/s/Hz.

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2014, Optics express.

Novel ultrafast TDM demultiplexing scheme using orthogonality in coherent Nyquist pulses

Masataka Nakazawa, Toshihiko Hirooka, Keisuke Kasai, 2014, 2014 The European Conference on Optical Communication (ECOC).

640-Gb/s/Channel Single-Polarization DPSK Transmission Over 525 km With Ultrafast Time-Domain Optical Fourier Transformation

Masataka Nakazawa, Toshihiko Hirooka, M. Nakazawa, 2010, IEEE Photonics Technology Letters.

Generation of 10 W, 100 fs, 10 GHz pulse train using high power EDFA-MOPA system with cascaded Raman pumping

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2015, 2015 Conference on Lasers and Electro-Optics (CLEO).

440 fs, 9.2 GHz regeneratively mode-locked erbium fiber laser with a combination of higher-order solitons and a SESAM saturable absorber.

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2016, Optics express.

Single-channel 5.12 Tbit/s (1.28 Tbaud) DQPSK transmission over 300 km using non-coherent Nyquist pulses.

Masataka Nakazawa, Toshihiko Hirooka, Daiki Suzuki, 2016, Optics express.