针对热容运转模式下的固体激光器,修正了二极管泵浦光强分布,并且考虑激光工作物质的比热容和热传导率随温度变化的特性,建立了三角均布脉冲LD侧面泵浦固体激光工作物质的热传导物理模型。利用有限元方法,模拟分析了激光工作物质的温度变化过程。结果表明,由于泵浦光的不均匀分布,热容运转模式下的固体激光器仍然会受到热效应的影响。分析比较了热容固体激光器和连续泵浦、脉冲泵浦模式下热稳态固体激光器工作物质的热效应,3种工作模式下,激光工作物质内的最大温差分别为3.59、35.51、8.07 K。表明热容运转模式下,激光工作物质内温度梯度非常小。讨论结果对热容激光器的设计工作提供了参考。
固体激光器 热容运转模式 热效应 有限元分析 solid state laser heat capacity mode thermal effect finite element analysis
Author Affiliations
Abstract
1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
2 Graduate School of the Chinese Academy of Sciences, Beijing 100039
3 Physics Department, Shihezi University, Shihezi 832003
A high power continuous-wave (CW) diode-pumped Nd:YAG laser operated in heat capacity mode is demonstrated by use of two identical highly efficient diode-pumped laser heads placed in a plane-plane resonator. The laser heads are uniformly pumped with a five-fold symmetrical side-pumping configuration, and each head is able to output maximum output power of 2200 W at 808 nm. Under a total pump power of 4290 W, the output power of the laser at 1064 nm is up to 2277 W, corresponding to an optical-to-optical efficiency of 53.1%.
连续波 热容运转模式 全固态 Nd:YAG 140.3480 Lasers, diode-pumped 140.4780 Optical resonators 140.3530 Lasers, neodymium Chinese Optics Letters
2007, 5(4): 226
