冷原子干涉仪激光控制系统集成化设计及其在重力测量中的应用  

Integrated design of the laser control system in cold atom interferometer and its application in gravity measurement

作　　者：陈玮婷 孔德龙 裴闯[1] 王杰英 韦俊新[1] 赵小明[1,2] CHEN Weiting;KONG Delong;PEI Chuang;WANG Jieying;WEI Junxin;ZHAO Xiaoming(Tianjin Navigation Instrument Research Institute,Tianjin 300131,China;Maritime Support and Technology Laboratory of China State Shipbuilding Corporation,Tianjin 300131,China)

机构地区：[1]天津航海仪器研究所,天津300131 [2]中国船舶集团有限公司航海保障技术实验室,天津300131

出　　处：《中国惯性技术学报》2022年第5期666-673,共8页Journal of Chinese Inertial Technology

基　　金：装备预研船舶重工联合重大基金项目(6141B041101-06);天津市智能制造资金支持项目(2019050)。

摘　　要：为满足冷原子干涉仪工程化研制需求,推动其在重力测量等领域的实际应用,提出一种以现场可编程逻辑门阵列为集成微处理单元,以直接数字频率合成器为分布执行单元的单激光器激光控制方案,降低系统的尺寸重量功耗,提高控制的集成度,改善外场的适应能力。对基于该激光控制系统的性能进行了评估,并开展了^(87)Rb自由下落式冷原子干涉重力测量实验验证。实验结果表明,所提出方案能够适用于冷原子重力仪激光系统的输出控制,基于所搭建的激光控制系统完成了41小时的连续重力测量实验,重力固体潮测量稳定性达到4.3μGal@1 h,与原有实验室样机的重力测量性能相当,且体积重量功耗之乘积降低至其1/11。In order to meet the engineering development requirements of cold atom interferometer and facilitate the actual application in gravity measurement,a single laser control scheme with field programmable logic gate array as integrated micro-processing unit and direct digital frequency synthesizer as distributed execution unit is proposed,which reduces the size,weight and power and enhances the integration level as well as improves the out-field operating robustness.The performance of the laser control system based on the proposed method is evaluated and verified by the cold atom(^(87)Rb)interference experiment in free-falling mode for gravity measurement.The experimental results show that the proposed scheme can be applied to the output control of the laser system of the cold atom gravimeter.The experimental results verify the effectiveness of the proposed laser control system in cold-atom-interferometry gravimeter,and stability of 4.3μGal@1 h during a 41-hour measurement of earth tidal gravity is acquired using the cold-atom-interferometry gravimeter equipped with the proposed laser control system,which demonstrates a comparable performance compared to the traditional laboratory prototype,while the product of the size,weight&power reduced to its 1/11.

关 键 词：冷原子干涉 边带调制 直接数字频率合成 绝对重力仪 

分 类 号：TN2[电子电信—物理电子学]