Open Access1.5-µm band quantum-correlated photon pair generation in dispersion-shifted fiber: suppression of noise photons by cooling fiber
Author(s) -
Hiroki Takesue,
Kyo Inoue
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.007832
Subject(s) - physics , photon , optics , raman scattering , noise (video) , four wave mixing , quantum optics , quantum correlation , dispersion (optics) , atomic physics , quantum , raman spectroscopy , nonlinear optics , quantum mechanics , quantum entanglement , laser , quantum discord , artificial intelligence , computer science , image (mathematics)
Spontaneous four-wave mixing in a dispersion-shifted fiber (DSF) is a promising approach for generating quantum-correlated photon pairs in the 1.5 microm band. However, it has been reported that noise photons generated by the spontaneous Raman scattering process degrade the quantum correlation of the generated photons. This paper describes the characteristics of quantum-correlated photon pair generation in a DSF cooled by liquid nitrogen. With this technique, the number of noise photons was sufficiently suppressed and the ratio of true coincidence to accidental coincidence was increased to ~30.