Improvement of diodeendpumped 912 nm NdGdVOSub

Authors: Xin Yu Fei Chen Renpeng Yan Xudong Li Jing Gao Zhen Zhang Junhua Yu Zhonghua Zhang

Publish Date: 2009/09/25

Volume: 30, Issue: 4, Pages: 327-

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Abstract

To solve the thermal dissipation problem in diodeendpumped solid state lasers and improve the performance of 912 nm NdGdVO4 lasers a novel microchannel heat sink is designed and used in the experiments Heattransfer coefficients for the common heat sink and microchannel heat sink are calculated The results obtained for the heattransfer coefficient for the heat sink with a channel width of 02 mm is almost 5 times higher than that of the common one The heat resistance for the novel heat sink is analyzed Simulation results show that the maximum temperature in the laser crystal is reduced by 19°C at an absorbed pump power of 240 W and the heat transfer ability significantly increases if the microchannel heat sink is used Experimental results also indicate that the performance for a 912 nm laser is improved significantly using the novel heat sink especially from the aspects of laserbeam quality and power scaling

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