光纤通信窗口200 MHz宽带压缩态光场的制备(特邀)  

Preparation of 200 MHz Broadband Squeezed State of Optical Fields at Fiber Communication Window(Invited)

作　　者：梁少聪 成家霖 闫智辉[1,2] 贾晓军 Liang Shaocong;Cheng Jialin;Yan Zhihui;Jia Xiaojun(State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shanxi University,Taiyuan 030006,Shanxi,China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,Shanxi,China)

机构地区：[1]山西大学光电研究所量子光学与光量子器件国家重点实验室,山西太原030006 [2]山西大学极端光学协同创新中心,山西太原030006

出　　处：《光学学报(网络版)》2024年第2期42-47,共6页Acta Optica Sinica(Online)

基　　金：国家自然科学基金(61925503,62122044,62135008);国家重点研发计划(2022YFA1404500);山西省高等学校创新人才计划;山西省高校优秀创新团队奖励计划;山西省“1331工程”重点学科建设计划

摘　　要：正交压缩态的压缩方向与经典通信中的正交幅度调制兼容,因此基于正交压缩的量子通信协议更容易实现实用化和商用化。为此,在实验上制备了对应于光纤通信窗口的200 MHz宽带正交压缩态光场。首先,制作了腔长为8 mm的光学参量放大器,其半峰全宽达到210 MHz。然后,研制了1~300 MHz的低噪声平衡零拍探测器,其共模抑制比可以达到50 dB。最后,在1.3μm波长处获得了带宽为200 MHz的宽带压缩态光场,这为开展高速量子通信提供了必要的量子光源。The squeezing direction of the quadrature squeezed state is highly compatible with the quadrature amplitude modulation in classical communication,making the quantum communication protocol based on the quadrature squeezed state easier to implement and commercialize.Here,we experimentally prepare a 200 MHz broadband quadrature squeezed state corresponding to the optical fiber communication window.First,we construct an optical parametric amplifier with a cavity length of 8 mm and a full width at a half maximum of 210 MHz.Then,we develop a 1‒300 MHz low-noise balanced homodyne detector with a common-mode rejection ratio of up to 50 dB.Finally,we obtain a quadrature amplitude squeezed state with a bandwidth of 200 MHz at a wavelength of 1.3μm,providing the necessary quantum light source for high-speed quantum communication.

关 键 词：正交压缩态 宽带光学参量放大器 宽带平衡零拍探测器 光纤通信窗口 

分 类 号：O436[机械工程—光学工程]