Distributed-feedback laser action in Ce:LiCAF/LiSAF crystals

Mirrorless, distributed-feedback (DFB) laser action has previously been demonstrated in high gain media such as dyes and color center lasers. The feedback mechanism, which is associated with spatial modulation of the gain and refractive index, results in narrow linewidth oscillation within the DFB laser structure. In this paper, we describe DFB laser action in Ce:doped LiCAF and LiSAF gain media for the first time. Laser action for both hosts occurs near 290 nm.