全光纤便携式量子关联光子对源  

A Portable All-Fiber Source of Quantum-Correlated Photon-Pairs

作　　者：李小英[1] 张秀婷[1] 王堃[1] 崔亮[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院,光电信息技术教育部重点实验室,天津300072

出　　处：《光学学报》2013年第9期266-269,共4页Acta Optica Sinica

基　　金：国家自然科学基金(10774111);国家973计划(2010CB923101);国家博士后科学基金(20100470784)

摘　　要：实验演示了一台全光纤量子关联光子对源。该量子光源的全部器件均集成在一个3U标准机盒中,其脉冲抽运光的重复频率约为20MHz,输出的信号与闲置光子波长均在1550nm通信波段,且带宽均约为0.55nm。输出光子对的亮度最高可达每秒4×105对,当光子对的亮度约为每秒104对时,其符合计数与随机符合计数之比为10,说明信号和闲置光子之间存在很强的量子关联。该量子光源空间模式纯净,工作位置便于移动,可以低损耗地与现有的光纤通信网络耦合。An all-fiber source of photon-pairs is experimentally demonstrated. All the components of the source are integrated in a 3U standard case. The repetition rate of pump pulses is about 20 MHz. The wavelengths of both signal and idler photons are in the 1550 nm telecom band, and the bandwidths are about 0.55 nm. The highest brightness of the photon pairs out of the source is about 4× 105 pairs per second. When the brightness of photon pairs is about 104 pairs per second, the ratio between the coincidence and accidental coincidence rates is about 10, which shows there is a strong quantum correlation between the signal and idler photon pairs. Our quantum light source of photon pairs, which is portable and has the advantage of modal purity, can be coupled into the existing fiber network with extremely low loss.

关 键 词：量子光学 关联光子对 四波混频 光纤 量子通信 

分 类 号：O431.2[机械工程—光学工程]