Realization of a compact one-seed laser system for atom interferometer-based gravimeters

A simple and compact design of the laser system is important for realization of compact atom interferometers (AIs). We design and realize a simple fiber bench-based 780-nm laser system used for Rb-85 AI-based gravimeters. The laser system contains only one 780 nm seed laser, and the traditional frequency-doubling-module is not used. The Raman beams are shared with one pair of the cooling beams by using a liquid crystal variable retarder based polarization control technique. This laser system is applied to a compact AI-based gravimeter, and a best gravity measurement sensitivity of 230 mu Gal/Hz(1/2) is achieved. The gravity measurements for more than one day are also performed, and the long-term stability of the gravimeter is 5.5 mu Gal. (c) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

激光系统的简单紧凑设计对于实现小型原子干涉仪（AIs）至关重要。我们设计并实现了一种用于基于铷 - 85原子干涉仪的重力仪的简单的基于光纤平台的780纳米激光系统。该激光系统仅包含一个780纳米种子激光器，且未使用传统的倍频模块。通过使用基于液晶可变延迟器的偏振控制技术，拉曼光束与一对冷却光束共用。这种激光系统应用于一台小型基于原子干涉仪的重力仪，实现了230微伽/赫兹^(1/2)的最佳重力测量灵敏度。还进行了超过一天的重力测量，重力仪的长期稳定性为5.5微伽。（c）2018美国光学学会，依据美国光学学会开放获取出版协议条款