Cho C Y, Huang T L, Wen S M, Huang Y J, Huang K F, Chen Y F
Opt Express. 2014 Oct 20;22(21):25318-23. doi: 10.1364/OE.22.025318.
A Nd:YLF laser at cryogenic temperature is demonstrated for the first time with orthogonally polarized simultaneous emission at 1047 nm and 1053 nm. By exploring the temperature dependence of the fluorescence and the absorption spectra from the Nd:YLF crystal, the feasibility of simultaneous emission at low temperature is achieved. Due to the local heating from the pump absorption, the optimal temperature with respect to the pump power for balancing output powers of simultaneous emission is thoroughly explored. At the optimal temperature of 138 K, the total output power of the simultaneous emission can reach 3.1 W at an incident pump power of 7.9 W, corresponding to the optical to optical slope efficiency up to 43%.
首次展示了在低温下的掺钕钇锂氟化物（Nd:YLF）激光器，其在1047纳米和1053纳米处具有正交偏振同时发射。通过研究Nd:YLF晶体荧光和吸收光谱的温度依赖性，实现了低温下同时发射的可行性。由于泵浦吸收产生的局部加热，深入探究了关于泵浦功率的用于平衡同时发射输出功率的最佳温度。在138K的最佳温度下，当入射泵浦功率为7.9W时，同时发射的总输出功率可达3.1W，对应的光光斜率效率高达43%。
