Review of the formula of thermal focal length in side-pumped laser rods |
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| Authors: | Liang Liu [Author Vitae] Xiaobo Wang [Author Vitae]Author Vitae] Xiaojun Xu [Author Vitae]Author Vitae] |
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| Affiliation: | Opto-electronic Science and Engineering College, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | The expressions of focal length in side-pumped rod lasers are studied. Good agreement is obtained between simulation and experiments reported previously, using Koechner's theory. The results reveal that underestimation of thermal lens accrues from overestimating the material's thermal conduction and without considering the nonuniform heat deposit. In the case of Nd:YAG rods, temperature-dependent variation of the refractive index constitutes the major contribution of thermal lensing, whereas the temperature- and stress-dependent variations of the refractive index make the major contributions of thermal lensing for Nd:Glass rod lasers. |
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| Keywords: | Solid-state laser Thermal effect |
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