Theoretical study of photon pair generation through spontaneous four-wave mixing in a dispersion shifted fiber

Xiaoxin Ma, Lei Yang, Xueshi Guo +1 more

Heedeuk Shin, Dongjin Lee, Kyung Deuk Park

Shailendra Kumar Varshney

Hiroki Takesue, Kyo Inoue

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.

Xiaoying Li, Xiaoxin Ma, Zhe Yu Ou +3 more

Spectral correlation of photon pairs generated in dispersion shifted fiber by a pulsed pump is theoretically analyzed and experimentally investigated. We first calculate the spectral function of photon pairs according to the deduced two-photon state generated by spontaneous four wave mixing under the assumptions close to the real experimental conditions. We then experimentally study the spectral property of the signal and idler photon pairs generated in optical fiber by photon correlation measurements, and the experimental results agree with the calculation. The investigation is useful for developing fiber-based sources of entangled photon pairs and for studying multi-photon quantum interference with multiple photon pairs.

Joshua A. Slater, Ahdiyeh Delfan Abazari, Allison Rubenok +3 more