Progress on a Highly Compact Cesium CPT Clock Based on a Dual-Frequency VECSEL

We developed and tested a miniature optical bench to implement a cesium CPT clock based on a Vertical External Cavity Surface Emitting Laser (VECSEL) that provides two orthogonally polarized frequencies separated by a difference of 9.2 GHz. This work presents characterizations of the miniature optical power stabilization set-up as well as preliminary investigations of the VECSEL properties.