The effect of the thermal lens in optically pumped laser rods operated in heat capacity mode

Yi Yang; XiaoJun Xu; Baihong Shu

doi:10.1117/12.570321

26 January 2005 The effect of the thermal lens in optically pumped laser rods operated in heat capacity mode

Yi Yang, XiaoJun Xu, Baihong Shu

Proceedings Volume 5627, High-Power Lasers and Applications III; (2005) https://doi.org/10.1117/12.570321
Event: Photonics Asia, 2004, Beijing, China

Abstract

Solid-state heat-capacity laser (SSHCL) has been developed in recent years. One of the key features of this heat capacity approach is the inversion of the temperature profile through the medium as compared to conditions where the laser is actively cooled while lasing takes place. So the thermal effects in the active medium on the two conditions mentioned above must be different. In this paper, we mostly discuss the contribution of temperature gradients to the effect of the thermal lens in optically pumped cylindrical laser rods operated in heat capacity operation through classical thermal conductivity equation, end effects and birefringence of the material with stress from temperature gradients ignored. Expressions are derived for the focus length of thermal lensing in laser rods for single-shot and repetitively pulsed operations. Programming the computer, we respectively calculate the thermal induced refractive power of the laser rods in the heat capacity operation and on the cooling condition, and compare the double results.

Citation Download Citation

Yi Yang, XiaoJun Xu, and Baihong Shu "The effect of the thermal lens in optically pumped laser rods operated in heat capacity mode", Proc. SPIE 5627, High-Power Lasers and Applications III, (26 January 2005); https://doi.org/10.1117/12.570321

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