PHONON BAND EDGE EMISSION-BASED ALL SOLID STATE HIGH POWER SLAB LASER

摘要

Provided is a phonon band edge emission-based all solid state high power slab laser, comprising a pump source, a focussing system, a laser resonant cavity and a self-frequency doubling crystal. The self-frequency doubling crystal is an ytterbium ion doped calcium oxoborate rare earth salt crystal cut into a slab shape along a crystal non-principal plane maximum effective non-linear coefficient direction. A tangential direction of the crystal is altered to implement different wavelength phase matching, and a 560-600nm wave band laser output. The pump source is a laser diode array having a wavelength of 880nm-980nm. An input cavity mirror and an output cavity mirror are coated to obtain the 560-600nm wave band laser output. Two large planes of the self-frequency doubling crystal are cooled by a heat sink, and are located between the input cavity mirror and the output cavity mirror. The laser implements a high power stable laser output, and has a low laser threshold value, a high conversion efficiency, and a simple laser design.