Vol. 30, Issue 1, pp. 161-171

Abstract

A model of an intracavity frequency doubled laser pumped by a laser beam was elaborated. The effects connected with mode matching, thermal lensing, pump induced diffraction losses, as well as parameters of frequency conversion and geometry of cavity were considered. An analytical model of the cavity with an internal lens and thermal lensing was derived to optimize output characteristics. Two types of cavity (with and without internal lens) were analyzed and the best configurations with respect to second harmonic output power were found for both cases. The pump induced diffraction losses were found to limit the output power of the frequency doubled laser for high pump levels.