基于三级非等长非线性干涉仪的便携式纠缠光子对源  

Portable Polarization-Entangled Quantum Photon Source Base onUn-Even Three-Stage Nonlinear Interferometer

作　　者：陈浩然 崔亮 李嘉敏[1,2] 李小英 Chen Haoran;Cui Liang;Li Jiamin;Li Xiaoying(School of Precision Instruments and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,China;Key Laboratory of Opto-Electronic Information Technology,Ministry of Education,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072 [2]天津大学教育部光电信息技术科学重点实验室,天津300072

出　　处：《激光与光电子学进展》2024年第15期332-338,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(11527808)。

摘　　要：基于三级非等长非线性干涉仪研制了1550 nm通信波段便携式偏振纠缠光子对量子光源,其中,三级非等长非线性干涉仪由3根长度呈二项分布(1:2:1)的色散位移光纤和单模光纤构成。偏振纠缠量子光源产生的纠缠光子对收集效率大于85%,在符合计数率为4 kHz的条件下,双光子干涉可见度可达(77.1±0.6)%,在损耗仅为光纤传输损耗的情况下,成功利用单模光纤远距离分发纠缠光子对超100 km。Based on the un-even three-stage nonlinear interferometer instrument,this article has developed 1550 nm communication band portable polarization-entangled quantum photon source,in which three nonlinear fibers with lengths following binomial distribution(1∶2∶1)are sandwiched with two standard single mode fibers.The collection efficiency of entangled photons generated by polarized entangled quantum photon sources is greater than 85%.Under the condition of a counting rate of 4 kHz,the two-photon interference visibility of the entangled source is(77.1±0.6)%.In the case where the loss is only fiber transmission loss,the single-mode fiber is successfully used to distribute entangled photon pairs over 100 km over long distances.

关 键 词：三级非等长非线性干涉仪 便携式 偏振纠缠光子对源 远距离分发 

分 类 号：O437[机械工程—光学工程]