28 January 2009 Thermal effect of Nd:YVO4 crystal by laser diode end-pumped
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Based on Possion equation, a thermal conduct model of laser crystal was established. The temperature distribution in laser crystal were obtained,and the optics path difference(OPD) induced by end-face distortion and total OPD were caculated. Based on the calculation, the focal length of laser crystal with different pumping powers was obtained. The experimental result agrees with the caculated result very well. When the pumping power is 2 W and the radius of pumping beams is 320μm; the OPD induced by end-face distortion is 36% of the toatal OPD for ND:YVO4 crystal. When the pumping power is 5W, the focal length of crystal is 29.7mm. The study shows that, for the solid-stste laser with high power, the OPD induced by end-face distortion has a large influence on theraml effect of laser crystal. This study provides a theoretical direction for improving the stability of laser and studying the thermal effect of laser crystal.
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Yibo Zheng, Yibo Zheng, Lei Zhang, Lei Zhang, Liping Jia, Liping Jia, Junjian Kang, Junjian Kang, } "Thermal effect of Nd:YVO4 crystal by laser diode end-pumped", Proc. SPIE 7156, 2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments, 71562F (28 January 2009); doi: 10.1117/12.807052; https://doi.org/10.1117/12.807052

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