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3 results on '"Shuro Izumi"'

1. Sensitivity enhancement by mode entanglement in distributed phase sensing

Author

Johannes Borregard, Shuro Izumi, Jonas S. Neergaard-Nielsen, Ulrik L. Andersen, Casper R. Breum, Xueshi Guo, and Mikkel V. Larsen

Subjects
Physics, Photon, business.industry, Phase (waves), Quantum metrology, Mode (statistics), Optoelectronics, Quantum Physics, Quantum entanglement, Sensitivity (control systems), Quantum key distribution, business, Squeezed coherent state
Abstract

We investigate the sensitivity of distributed phase sensing with squeezed state probes. By creating mode entanglement between probes with a beam-splitter network, sensitivity enhancement over independent probes is observed experimentally for the first time.

Published
2019

2. 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

3. 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

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