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Numerical simulation and experimental study of thermal-induced-depolarization in 2 m Cr,Tm,Ho:YAG laser

Li Zhe Jiang Hai-He Wang Li Yang Jing-Wei Wu Xian-You

Numerical simulation and experimental study of thermal-induced-depolarization in 2 m Cr,Tm,Ho:YAG laser

Li Zhe, Jiang Hai-He, Wang Li, Yang Jing-Wei, Wu Xian-You
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  • Received Date:  20 April 2011
  • Accepted Date:  03 May 2011
  • Published Online:  15 April 2012

Numerical simulation and experimental study of thermal-induced-depolarization in 2 m Cr,Tm,Ho:YAG laser

  • 1. Anhui institute of optics and fine mechanics, Chinese Academy of Sciences, Hefei 230031, China
Fund Project:  Project supported by the National Natural Science Foundation of China(Grant No. 90922003) and the Innovation Key Program of Chinese Academy of Sciences(Grant No. KJCX2-EW-NO7).

Abstract: The theory of thermal-induced-depolarization is analyzed, the distribution of depolarization is numerically simulated, and the result is verified by the polarized light interferometry. The experimental result is coincident with the numerical simulation, which shows that the distribution of depolarization in the cross section of Cr,Tm,Ho:YAG is crisscross, and increases with the pump energy increasing. The direction of the worst depolarization is 45 with respect to the polarization direction of the polarizer. According to the numerical simulation, we employ a /4-plate to compensate the depolarization of a high-energy Cr,Tm,Ho:YAG laser. The pulse energy increases by 24% after compensation.

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