探测光对里德堡原子微波超外差接收系统瞬时带宽影响研究  

Influence of Probe Laser on Instantaneous Bandwidth of Rydberg Atomic Microwave Superheterodyne Receiver System

作　　者：刘成敬 安强 武博 吴逢川 刘燚 林沂 Liu Chengjing;An Qiang;Wu Bo;Wu Fengchuan;Liu Yi;Lin Yi(College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,Hunan,China)

机构地区：[1]国防科技大学电子科学学院,湖南长沙410073

出　　处：《激光与光电子学进展》2024年第17期372-378,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(12104509);湖南省自然科学基金(2022JJ40556)。

摘　　要：瞬时带宽是里德堡原子微波超外差接收系统的关键技术指标之一,直接影响其在通信、雷达、导航等领域的实际应用。根据激光-原子-微波相互作用机理,系统中使用的激光参数对瞬时带宽具有较大影响,尤其是探测光直径和探测光功率等。采用光学透镜组合对探测光光束直径进行调控,采用半波片对探测光功率进行调控。实验测量了不同探测光直径和功率下,系统的瞬时带宽并分析其影响规律,为里德堡原子微波超外差接收系统的优化设计提供技术支撑。实验结果表明,探测光光束直径和功率的减小能够实现系统瞬时带宽的拓展,对系统瞬时带宽拓展能力逐步增强,但随着光束直径和功率的减小,其响应幅度也减小。Instantaneous bandwidth is one of the fundamental technical indexes of the Rydberg atomic microwave superheterodyne receiver system that directly affects its practical application in communication,radar,and navigation.According to the laser-atom-microwave interaction mechanism,laser parameters significantly influence the instantaneous bandwidth,especially the probe laser diameter and power.This study uses an optical lens combination to control the diameter of the probe laser and a half-wavelength plate to control the probe laser power.The instantaneous bandwidth under different probe laser diameters and powers is measured and its influence law is analyzed,supporting the optimal design of the Rydberg atomic microwave superheterodyne receiver system.The experimental results show that the decrease in beam diameter and power can expand the instantaneous bandwidth,and the expansion ability is gradually enhanced;however,the response amplitude decreases with the decrease in beam diameter and power.

关 键 词：里德堡原子 探测光直径 探测光功率 超外差接收 瞬时带宽测量 

分 类 号：TN851.4[电子电信—信息与通信工程]