Takeshi Umeki

发表

Low-noise phase-sensitive amplifier for guard-band-less 16-channel DWDM signal using PPLN waveguides

Takushi Kazama, Takeshi Umeki, Masashi Abe, 2016, 2016 Optical Fiber Communications Conference and Exhibition (OFC).

Receiver characteristics evaluation of over-gigabit indoor visible light transmission system with QPM device

Takeshi Umeki, Naoto Yoshimoto, M. Matsumoto, 2013 .

Compact sub-mW mid-infrared DFG laser source using direct-bonded QPM-LN ridge waveguide and laser diodes

Takeshi Umeki, Hiroyuki Suzuki, Katsuaki Magari, 2007, SPIE LASE.

Nonlinearity mitigation of PDM-16QAM signal using multiple CSI-OPCs in ultra-long haul transmission without excess penalty

Takayuki Kobayashi, Takushi Kazama, Takeshi Umeki, 2019, 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC).

Low noise and regenerative phase sensitive amplifier based on PPLN waveguides

Takeshi Umeki, Koji Enbutsu, Masaki Asobe, 2014, OFC.

PPLN-Based Low-Noise Phase Sensitive Amplification Using an Optical Phase-Locked Pump

Takushi Kazama, Takeshi Umeki, Koji Enbutsu, 2020, IEICE Trans. Commun..

[JSAP-OSA Joint Symposia 2017 Invited Talk] Solving intractable problems with coherent Ising machine

Takeshi Umeki, Koji Enbutsu, Hiroyuki Uchiyama, 2017 .

Phase Sensitive Amplifier Using Periodically Poled LiNbO3 Waveguides and Their Applications

Takeshi Umeki, Masaki Asobe, Osamu Tadanaga, 2018, IEICE Trans. Electron..

1.4μm-1.6μm Wavelength Conversion Using Multiple Quasi-Phase Matching LiNbO3

Takushi Kazama, Takeshi Umeki, Koji Enbutsu, 2019, 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC).

Gain Ripple and Passband Narrowing Due to Residual Chromatic Dispersion in Non-Degenerate Phase-Sensitive Amplifiers

Takushi Kazama, Takeshi Umeki, Koji Enbutsu, 2020, 2020 Optical Fiber Communications Conference and Exhibition (OFC).

Continuous and long-term stabilization of degenerate optical parametric oscillators for large-scale optical hybrid computers.

Takushi Kazama, Takeshi Umeki, Koji Enbutsu, 2020, Optics express.

Characteristics of Electromagnetic Force of Ground Coil for Levitation and Guidance at the Yamanashi Maglev Test Line

Takeshi Umeki, Hiroyuki Suzuki, Tsuyoshi Fujimoto, 2000 .

Low-Noise Phase Sensitive Amplification Using an Optical Phase-Locked Pump

Takushi Kazama, Takeshi Umeki, Koji Enbutsu, 2019, 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC).

Experimental investigation of performance differences between coherent Ising machines and a quantum annealer

Ken-ichi Kawarabayashi, Takeshi Umeki, Koji Enbutsu, 2018, Science Advances.

Combinatorial optimization with a network of degenerated optical parametric oscillators

Takeshi Umeki, Koji Enbutsu, Hiroki Takesue, 2019 .

Nonlinearity Mitigation of PDM-16QAM Signals Using Multiple CSI-OPCs in Ultra-Long-Haul Transmission without Excess Penalty

Takushi Kazama, Takeshi Umeki, Koji Enbutsu, 2020, IEICE Trans. Commun..

PPLN-based low-noise in-line phase sensitive amplifier with highly sensitive carrier-recovery system

Takeshi Umeki, Koji Enbutsu, Hirokazu Takenouchi, 2015, 2015 21st Asia-Pacific Conference on Communications (APCC).

First Demonstration of Multi-Span Transmission based on Recirculating Loop using PPLN-based PSA

Takeshi Umeki, 2013 .

Wideband Inline-Amplified WDM Transmission using PPLN-Based OPA with Over-10-THz Bandwidth

Munehiko Nagatani, Hideyuki Nosaka, Takushi Kazama, 2020, 2020 Optical Fiber Communications Conference and Exhibition (OFC).

Scaling advantages of all-to-all connectivity in physical annealers: the Coherent Ising Machine vs. D-Wave 2000Q pdf

Ken-ichi Kawarabayashi, Yoshihisa Yamamoto, Martin M. Fejer, 2018, ArXiv.

A coherent Ising machine for 2000-node optimization problems

Ken-ichi Kawarabayashi, Kazuyuki Aihara, Takeshi Umeki, 2016, Science.

Collective and synchronous dynamics of photonic spiking neurons pdf

Kazuyuki Aihara, Takeshi Umeki, Koji Enbutsu, 2020, Nature Communications.

PPLN-Based Low-Noise In-Line Phase Sensitive Amplifier with Highly Sensitive Carrier-Recovery System

Takeshi Umeki, Koji Enbutsu, Hirokazu Takenouchi, 2016 .

Estimation of Back-Off Loosening Limit for Bolted Joints under Transverse Cyclic Loading.

Takeshi Umeki, Toshio Hattori, Masayuki Nakamura, 2001 .

Chirp reduction utilizing phase squeezing property in PPLN-based phase sensitive amplifier

Takeshi Umeki, Masaki Asobe, Kouji Enbutsu, 2011, 2011 37th European Conference and Exhibition on Optical Communication.

Wideband PPLN-based optical parametric amplifiers for scalable optical transport network

Takeshi Umeki, Koji Enbutsu, Y. Miyamoto, 2021, 2021 Optical Fiber Communications Conference and Exhibition (OFC).

Potts model solver based on hybrid physical and digital architecture

Takeshi Umeki, Koji Enbutsu, Kyo Inoue, 2021, Communications Physics.

In-line phase-sensitive amplifier for QPSK signal using multiple QPM LiNbO3 waveguide

Takeshi Umeki, Yutaka Miyamoto, Hirokazu Takenouchi, 2013, 2013 18th OptoElectronics and Communications Conference held jointly with 2013 International Conference on Photonics in Switching (OECC/PS).

PDM Signal Amplification Using PPLN-Based Polarization-Independent Phase-Sensitive Amplifier

Takushi Kazama, Takeshi Umeki, Koji Enbutsu, 2015, Journal of Lightwave Technology.

Simultaneous nonlinearity mitigation in 92 × 180-Gbit/s PDM-16QAM transmission over 3840 km using PPLN-based guard-band-less optical phase conjugation.

Takushi Kazama, Takeshi Umeki, Masashi Abe, 2016, Optics express.

Flexible and transparent waveband conversion using multiple-QPM LiNbO3 waveguides

Takeshi Umeki, Shuto Yamamoto, Kazushige Yonenaga, 2010, 36th European Conference and Exhibition on Optical Communication.

3-dB signal-ASE beat noise reduction of coherent multi-carrier signal utilizing phase sensitive amplification.

Takeshi Umeki, Yutaka Miyamoto, Hidehiko Takara, 2012, Optics express.

Phase sensitive amplification with noise figure below the 3 dB quantum limit using CW pumped PPLN waveguide.

Takeshi Umeki, Masaki Asobe, Osamu Tadanaga, 2012, Optics express.

First demonstration of multi-span transmission using phase and amplitude regeneration in PPLN-based PSA

Takeshi Umeki, Yutaka Miyamoto, Hirokazu Takenouchi, 2013, 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC).

A high-speed visible light indoor network employing a short pulse modulation and a QPM-LN module

Takeshi Umeki, Hisaya Hadama, Takuya Kanai, 2011, 2011 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference.

First demonstration of high-order QAM signal amplification in PPLN-based phase sensitive amplifier

Takeshi Umeki, Yutaka Miyamoto, Hirokazu Takenouchi, 2013 .

First demonstration of noise figure below 3 dB in CW pumped phase sensitive amplifier using PPLN waveguide

Takeshi Umeki, Masaki Asobe, Osamu Tadanaga, 2011, CLEO: 2011 - Laser Science to Photonic Applications.

Phase sensitive degenerate parametric amplification using directly-bonded PPLN ridge waveguides.

Atsushi Takada, Takeshi Umeki, Masaki Asobe, 2011, Optics express.

Simulating Ising Spins in External Magnetic Fields with a Network of Degenerate Optical Parametric Oscillators

Takushi Kazama, Takeshi Umeki, Koji Enbutsu, 2020 .

High-power mid-infrared wavelength generation using difference frequency generation in damage-resistant Zn:LiNb0 3 waveguide

Takeshi Umeki, Masaki Asobe, Yoshiki Nishida, 2008 .

In-line phase sensitive amplifier based on PPLN waveguides.

Takeshi Umeki, Hirokazu Takenouchi, Masaki Asobe, 2013, Optics express.