Watt-level narrow-linewidth fibered laser source at 852 nm for FIB application

Abstract

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