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Your search keyword '"Kentaro Wakui"' showing total 5 results
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5 results on '"Kentaro Wakui"'

1. Efficient Generation of Twin Photons at Telecom Wavelengths with 10 GHz Repetition-Rate-Tunable Comb Laser

Author

Shuro Izumi, Isao Morohashi, Mikio Fujiwara, Shigehito Miki, Takahide Sakamoto, Ryosuke Shimizu, Rui-Bo Jin, Taro Yamashita, Hirotaka Terai, Masahide Sasaki, Zhen Wang, Masahiro Takeoka, and Kentaro Wakui

Subjects
Quantum optics, Physics, Photon, business.industry, Detector, Nonlinear optics, Laser, law.invention, Wavelength, Optics, Interference (communication), law, Optoelectronics, Photonics, business
Abstract

We demonstrate a down-conversion-based twin photon source pumped by a 10 GHz repetition-rate-tunable comb laser at 1553 nm wavelength. We show high Hong-Ou-Mandel interference visibilities, which are free from the pump-power induced degradation.

Published
2015

2. Ultrabroadband, Direct Detection of Nonclassical Photon Statistics in Parametric Fluorescence at Telecom Wavelength

Author

Kentaro Wakui, T. Yanagida, Shuro Izumi, Takayuki Numata, Yujiro Eto, Kazuhiro Ema, Masahide Sasaki, Daiji Fukuda, and Hugo Benichi

Subjects
Quantum optics, Physics, Photon, business.industry, Physics::Optics, Photodetector, Fluorescence spectroscopy, Optics, Spontaneous parametric down-conversion, Optoelectronics, Transition edge sensor, Photonics, business, Telecommunications, Parametric statistics
Abstract

Ultrabroadband photon-number-resolving detection is demonstrated for parametric fluorescence ranging over 150 nm in the telecom window, using a Ti transition edge sensor. Our results violate Klyshko's classical limit for even photon numbers.

Published
2013

3. High harmonic generation of Ti:S fs pulses using a passive cavity toward state detection of single indium ion

Author

Kazuhiro Hayasaka, Tetsuya Ido, and Kentaro Wakui

Subjects
Materials science, business.industry, chemistry.chemical_element, Atomic clock, Ion, Vacuum ultraviolet, Optics, Mode-locking, chemistry, Harmonic, Optoelectronics, Coherence (signal processing), High harmonic generation, business, Indium
Abstract

VUV pulses at 159nm were generated as the 5th high harmonic of passively enhanced Ti:S fs pulses. The average output of 1.5μW might be sufficient to realize direct state detection of an indium ion clock.

Published
2011

4. Recent Advances in Non-Gaussian Control of Optical Continuous Variables

Author

Masahide Sasaki, Kazuhiro Hayasaka, Kentaro Wakui, Masahiro Takeoka, and H. Takahashi

Subjects
Continuous variable, Quantum optics, Physics, Mesoscopic physics, symbols.namesake, Classical mechanics, Gaussian, Quantum superposition, symbols, Quantum entanglement, Photon counting, Coherence (physics)
Abstract

We present recent experimental progress in non-Gaussian control of optical continuous variables of traveling light, including generation and control of mesoscopic quantum superposition states and non-Gaussian entanglement control of continuous variables.

Published
2009

5. Control of superposition states of continuous variables by photon counting and filtering with cw squeezed light

Author

Kazuhiro Hayasaka, Kentaro Wakui, Masahiro Takeoka, Shigenari Suzuki, Masahide Sasaki, and H. Takahashi

Subjects
Quantum optics, Physics, Superposition principle, Photon, Quantum mechanics, Subtraction, State (functional analysis), Multiplexing, Photon counting, Computer Science::Information Theory, Squeezed coherent state
Abstract

The two-photon subtraction from overlapping squeezed packets generates temporally multiplexed superposition states of continuous variables with a designated time separation. In an appropriate mode an amplified superposition state is produced due to bosonic quantum interference.

Published
2008

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