中国物理B ›› 2006, Vol. 15 ›› Issue (12): 2963-2969.doi: 10.1088/1009-1963/15/12/033

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Temperature-related performance of Yb3+:YAG disk lasers and optimum design for diamond cooling

王晓峰1, 曹丁象2, 於海武3, 郑万国3, 贺少勃3   

  1. (1)National University of Defence Technology, Changsha 410073, China;; (2)National University of Defence Technology, Changsha 410073, China; Research Center of Laser Fusion, CAEP, Mianyang 621900, China; (3)Research Center of Laser Fusion, CAEP, Mianyang 621900, China
  • 收稿日期:2006-03-03 修回日期:2006-05-28 出版日期:2006-12-20 发布日期:2006-12-20

Temperature-related performance of Yb3+:YAG disk lasers and optimum design for diamond cooling

Cao Ding-Xiang(曹丁象)a)b)†, Yu Hai-Wu(於海武)b) , Zheng Wan-Guo(郑万国)b), He Shao-Bo(贺少勃)b), and Wang Xiao-Feng(王晓峰)a)   

  1. a National University of Defence Technology, Changsha 410073, China;; b Research Center of Laser Fusion, CAEP, Mianyang 621900, China
  • Received:2006-03-03 Revised:2006-05-28 Online:2006-12-20 Published:2006-12-20

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摘要： In this paper the temperature-related performances of the Yb3+:YAG disc laser has been investigated based on quasi-three level rate equation model. A compact diamond window cooling scheme also has been demonstrated. In this cooling scheme, laser disc is placed between two thin discs of single crystal synthetic diamond, the heat transfer from Yb3+:YAG to the diamond, in the direction of the optical axis, and then rapidly conducted radically outward through the diamond to the cooling water at the circumference of the diamond/Yb3+:YAG assembly. Simulation results show that increasing the thickness of the diamond and the overlap-length (between diamond and water) decreases the disc temperature. Therefore a 0.3--0.5mm thick diamond window with the overlap-length of 1.5--2.0mm will provide acceptable cost effective cooling, e.g., with a pump intensity of 15kW/cm2 and repetitive rate of 10Hz, to keep the maximum temperature of the lasing disc below a reasonable value (310K), the heat exchange coefficient of water should be about 3000 W/m2K.

关键词: Yb3+:YAG, diamond, thermal management, temperature effect, diode-pumped

Abstract: In this paper the temperature-related performances of the Yb3+:YAG disc laser has been investigated based on quasi-three level rate equation model. A compact diamond window cooling scheme also has been demonstrated. In this cooling scheme, laser disc is placed between two thin discs of single crystal synthetic diamond, the heat transfer from Yb3+:YAG to the diamond, in the direction of the optical axis, and then rapidly conducted radically outward through the diamond to the cooling water at the circumference of the diamond/Yb3+:YAG assembly. Simulation results show that increasing the thickness of the diamond and the overlap-length (between diamond and water) decreases the disc temperature. Therefore a 0.3--0.5mm thick diamond window with the overlap-length of 1.5--2.0mm will provide acceptable cost effective cooling, e.g., with a pump intensity of 15kW/cm2 and repetitive rate of 10Hz, to keep the maximum temperature of the lasing disc below a reasonable value (310K), the heat exchange coefficient of water should be about 3000 W/m2K.

Key words: Yb3+:YAG, diamond, thermal management, temperature effect, diode-pumped

中图分类号:  (Semiconductor lasers; laser diodes)

  • 42.55.Px
42.60.Da (Resonators, cavities, amplifiers, arrays, and rings)