Effect of Rod Crystal Dimensions on Thermal Stress in Nd: YLF Laser with 20W End-Diode Pumped

Theoretical results are reported on thermal stress effects along the π 1047 nm and σ 1053 nm polarizations in an a cut Nd: YLF rod crystal by using 20 W diode-end-pumped. The effects of rod crystal length and radius on the distribution of radial temperature and thermal stress are studied. The result from this study has shown that the temperature in a center of rod is decreased when the length of crystal increases. The center of the rod is under compression, while the surface of the rod is under tension. Furthermore, the effect of thermal stress for π polarized 1047 nm is stronger than σ polarized 1053 nm.

Author(s): Khalid A Yahya, Oday A Hussein and Ola H Mustafa

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