Abstract
To solve the thermal dissipation problem in diode-end-pumped solid state lasers and improve the performance of 912 nm Nd:GdVO4 lasers, a novel microchannel heat sink is designed and used in the experiments. Heat-transfer coefficients for the common heat sink and microchannel heat sink are calculated. The results obtained for the heat-transfer coefficient for the heat sink with a channel width of 0.2 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 24.0 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 laser-beam quality and power scaling.
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Yu, X., Chen, F., Yan, R. et al. Improvement of diode-end-pumped 912 nm Nd:GdVO4 laser performance based on microchannel heat sink. J Russ Laser Res 30, 327–337 (2009). https://doi.org/10.1007/s10946-009-9086-x
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DOI: https://doi.org/10.1007/s10946-009-9086-x