Photon statistics of pulse-pumped four-wave mixing in fiber with weak signal injection

• Published in: Chinese physics B Vol. 25; no. 7; pp. 229 - 233
• Main Author: 刘楠楠 刘宇宏 李嘉敏 李小英
• Format: Journal Article
• Language: English
• Published: 01.07.2016
• Subjects: 信号注入法; 光子统计; 光纤; 四波混频; 密集波分复用网络; 强度相关函数; 玻色-爱因斯坦分布; 脉冲泵浦
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/25/7/074203

We study the photon statistics of pulse-pumped four-wave mixing in fibers with weak coherent signal injection by measuring the intensity correlation functions of individual signal and idler fields. The experimental results show that the intensity correlation function of individual signal（idler） field g_（s（i））~（2） decreases with the intensity of signal injection. After applying narrow band filter in signal（idler） band, the value of g_（s（i））~（2） decreases from 1.9 ± 0.02（1.9 ± 0.02） to 1.03 ± 0.02（1.05 ± 0.02） when the intensity of signal injection varies from 0 to 120 photons/pulse. The results indicate that the photon statistics changes from Bose–Einstein distribution to Poisson distribution. We calculate the intensity correlation functions by using the multi-mode theory of four-wave mixing in fibers. The theoretical curves well fit the experimental results.Our investigation will be useful for mitigating the crosstalk between quantum and classical channels in a dense wavelength division multiplexing network.