Takushi Kazama

100,000-spin coherent Ising machine

Toshimori Honjo, Tomohiro Sonobe, Takahiro Inagaki et al. · Science Advances · 2021 · 329 citations · Full text

Natural Sciences, Computer Engineering, Computer Science +10

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

Takeshi Umeki, Takushi Kazama, Akihide Sano et al. · Optics Express · 2016 · 75 citations · Full text

Engineering, Electrical Engineering, Optics +16

Wide-Band Inline-Amplified WDM Transmission Using PPLN-Based Optical Parametric Amplifier

Takayuki Kobayashi, Shimpei Shimizu, Masanori Nakamura et al. · Journal of Lightwave Technology · 2020 · 61 citations · Full text

Engineering, Electrical Engineering, Optics +16

Over-30-dB gain and 1-dB noise figure phase-sensitive amplification using a pump-combiner-integrated fiber I/O PPLN module

Takushi Kazama, Takeshi Umeki, Shimpei Shimizu et al. · Optics Express · 2021 · 56 citations · Full text

Engineering, Electrical Engineering, Optics +16

Over-8-dB squeezed light generation by a broadband waveguide optical parametric amplifier toward fault-tolerant ultra-fast quantum computers

Takahiro Kashiwazaki, Taichi Yamashima, Koji Enbutsu et al. · Applied Physics Letters · 2023 · 55 citations · Full text

Engineering, Electrical Engineering, Physics +17