Design criteria for mode size optimization in diode-pumped solid-state lasers

TLDR

The study proposes design and optimization criteria for the mode size of diode‑pumped solid‑state lasers based on space‑dependent rate‑equation analysis, assuming a TEM00 single transverse mode and circular or elliptic Gaussian pump beams. The authors use space‑dependent rate‑equation analysis and simple plots to determine the optimum spot size, laser threshold, slope efficiency, and expected output power. The optimum ratio between mode and pump spot size increases with input power and pump beam ellipticity, and experimental results from an end‑pumped Nd:YAG laser confirm the design predictions. Other information not available.

Abstract

Based on space-dependent rate equation analysis, design and optimization criteria for the mode size of diode-pumped solid-state lasers are proposed, assuming an TEM/sub 00/ single transverse mode in the resonator and circular or elliptic Gaussian pump beam. The optimum ratio between mode and pump spot size increases with input power and ellipticity of the pump beam. Simple plots may be used as guidelines to determine, in addition to the optimum spot size, the corresponding laser threshold, slope efficiency, and expected output power. Experimental examples are given for an end-pumped Nd:YAG laser, showing good agreement with the design predictions. >