We realize a 1 W all-fibered polarized compact and robust laser source at 852 nm for laser cooling of cesium atoms. The architecture is based on the sum-frequency generation of 1540 and 1908 nm lasers, realized through a periodically poled lithium niobate waveguide with a conversion efficiency of 40%. A linewidth of 20 kHz is achieved with the development of a distributed feedback fiber laser at 1908 nm. The operation of this laser source is demonstrated on a focused ion beam (FIB) experiment based on cold cesium atoms.

中文翻译：

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用于FIB应用的852 nm的瓦特级窄线宽光纤激光源

我们实现了1 W全光纤偏振紧凑且坚固耐用的852 nm激光源，用于铯原子的激光冷却。该架构基于1540和1908 nm激光器的总和频率产生，该激光器是通过周期性极化的铌酸锂波导实现的，转换效率为40％。通过开发1908 nm的分布式反馈光纤激光器，可以实现20 kHz的线宽。该激光源的操作在基于冷铯原子的聚焦离子束（FIB）实验中得到了证明。