用于原子重力仪的外腔半导体激光器的两种稳频方法比较（英文）

发布时间：2018-04-05 04:31

本文选题：稳频　切入点：外腔半导体激光器　出处：《红外与激光工程》2017年01期

【摘要】：在铷原子气室中实现了饱和吸收谱稳频法和消多普勒的双色谱稳频法,以给在建的原子干涉重力仪系统选择合适的激光稳频方法。介绍了两种稳频方法的基本原理及实验细节。通过调整光路设计、自制低噪声光电探测器以及应用数字锁定模块,获得了良好的鉴频误差信号。每种方法都搭建了两套稳频系统并在3000s采集时间内保持锁定。激光器在经饱和吸收法和消多普勒双色谱法锁定后,激光频率波动分别为16.2kHz和31.4kHz,相应于在10s采样时间下分别获得4.21×10~(-11)和8.18×10~(-11)的频率稳定度;相比之下,激光器自由运转时,频率波动和稳定度分别为629kHz和1.64×10-9。在原子重力仪系统小型化的需求下详述了两种稳频方法的优缺点,比较而得消多普勒的双色谱稳频法在原子干涉重力仪的小型化模块化发展方向不失为具有潜力的一种选择。
[Abstract]:The saturated absorption spectrum method and dual-chromatographic frequency stabilization method are realized in rubidium atomic gas chamber to select suitable laser frequency stabilization method for the system of atomic interference gravimeter under construction.The basic principle and experimental details of two frequency stabilization methods are introduced.By adjusting the design of optical path, self-made low noise photodetector and digital locking module, a good frequency discrimination error signal is obtained.In each method, two stable frequency systems were built and locked in 3 000 s.The laser frequency fluctuation is 16.2kHz and 31.4kHz after the laser is locked by saturated-absorption method and dual-chromatographic method, respectively, corresponding to the frequency stability of 4.21 脳 10 ~ (-11) and 8.18 脳 10 ~ (10) ~ (-11) laser at 10 s sampling time respectively, in contrast, when the laser is in free operation,The frequency fluctuation and stability are 629kHz and 1.64 脳 10-9, respectively.Under the demand of miniaturization of atomic gravimeter system, the advantages and disadvantages of two frequency stabilization methods are described in detail. Compared with the dual-chromatographic frequency stabilization method without Doppler, it is a potential choice for the miniaturization and modularization of atomic gravimeter.
【作者单位】：北京长城计量测试技术研究所计量与校准技术国防科技重点实验室;
【基金】：国防军工技术基础项目(JSJC20122205C001)
【分类号】：TN248.4

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