空间窄线宽激光器光学系统研究  

Optical System of Spatial Narrow Linewidth Laser

作　　者：张秀萍 张林波[1,2,3] 刘军 江晨晖[1,2,3] 许冠军 陈龙[1,2,3] 刘涛 张首刚[1,3] Zhang Xiuping;Zhang Linbo;Liu Jun;Jiang Chenhui;Xu Guanjun;Chen Long;Liu Tao;Zhang Shougang(National Time Service Center, Chinese Academy of Sciences, Xi＇an, Shaanxi 710600, China;University of Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Time and Frequency Primary Standards, Chinese Academy of Sciences Xiran, Shaanxi 710600, China)

机构地区：[1]中国科学院国家授时中心,陕西西安710600 [2]中国科学院大学,北京100049 [3]中国科学院时间频率基准重点实验室,陕西西安710600

出　　处：《光学学报》2018年第4期255-261,共7页Acta Optica Sinica

基　　金：国家重点研发计划(2016YFF0200200);国家自然科学基金(11273024;61025023);国家自然科学基金青年科学基金(11403031);国家自然科学基金重大研究计划(91636101);国家重大科研仪器设备研制专项(61127901)

摘　　要：空间窄线宽激光器作为空间锶光钟的本地振荡源,决定了空间锶原子光钟的中短期稳定度。由于空间站的载荷资源有限,空间窄线宽激光器光学系统既要满足空间光钟参考跃迁的功能要求,又要考虑体积、重量等因素。此外,由于空间窄线宽激光器系统对功耗、热耗都有严格的要求,在激光源输出光功率一定的条件下提高系统光功率的利用率,是保证后续光路光功率需求的关键。为了减小体积,减轻系统重量,采用小型化光学组件构建系统光路;为提高系统光功率的利用率,采用短焦双透镜方案,在此基础上构建该光学功能单元的实验平台。结果显示:声光调制器的单通衍射效率大于90%,双通衍射效率大于70%。对声光调制器驱动信号进行扫描,在±20 MHz扫描范围内,光纤耦合效率变化了50%,基本满足了空间和功率上的应用要求。Spatial narrow linewidth laser,as the local oscillation of the spatial strontium atomic clock,determines the short-and medium-term stability of the space strontium atomic clock.Due to the limited load resources of the space station,the optical system of spatial narrow linewidth laser not only meets the functional requirements of the space light clock reference transition,but also considers the factors of volume and weight.In addition,the space narrow linewidth laser system has strict requirements on the power and heat consumptions.Improving the optical power utilization efficiency under the condition that the output optical power of the laser source is constant is the key to ensure the follow-up optical path power demand.In order to reduce the volume and the weight of the system,we build the optical path of the system with the miniaturized optical components.To improve the utilization ratio of the optical power of the system,we build the experimental platform of the optical functional unit on the basis of the short focal two-lens scheme.The result shows that the single-pass diffraction efficiency of the acousto-optic modulator is greater than 90%,and the double-pass diffraction efficiency is greater than 70%.We scan the acoustooptic modulator drive signal.It is found that the optical fiber coupling efficiency changes by 50% within±20 MHz scanning range,which satisfies the space and power application requirements.

关 键 词：激光器 窄线宽激光 声光调制器 频率调谐带宽 空间应用 

分 类 号：O439[机械工程—光学工程]