Lee Kangin, Kim Youngjung, Lee Sijin, Kwon Jin Hyuk, Gwak Jin Seog, Yi Jonghoon
Appl Opt. 2013 Aug 20;52(24):5967-73. doi: 10.1364/AO.52.005967.
It is demonstrated by numerical modeling that spectrally dispersed compound pumping diodes and low-loss pumping chamber reduced the temperature dependence of the output energy of quasi-continuous wave diode-pumped Nd:YAG lasers considerably. Several compound diodes with different spectral profiles were tested for pumping. The laser energy was calculated as a function of diode temperature from -30°C to 60°C. When a compound diode with a flat-top spectrum was used for pumping, the mean laser energy was 83% of the maximum energy of a Nd:YAG laser pumped by a diode with a narrow bandwidth. In addition, a compound diode with three emission lines was tested for pumping. When the wavelength gap between the adjacent emission lines of the pumping diode was in the range of 3-10 nm, the mean energy of the Nd:YAG laser became similar to that of a Nd:YAG laser pumped by a diode with a flat-top spectrum.
数值模拟表明，光谱分散的复合泵浦二极管和低损耗泵浦腔显著降低了准连续波二极管泵浦Nd:YAG激光器输出能量的温度依赖性。测试了几种具有不同光谱分布的复合二极管用于泵浦。计算了激光器能量随二极管温度从-30°C到60°C的变化函数。当使用具有平顶光谱的复合二极管进行泵浦时，平均激光能量为窄带宽二极管泵浦的Nd:YAG激光器最大能量的83%。此外，还测试了具有三条发射线的复合二极管用于泵浦。当泵浦二极管相邻发射线之间的波长间隔在3-10nm范围内时，Nd:YAG激光器的平均能量变得与平顶光谱二极管泵浦的Nd:YAG激光器相似。
