1 319和1 338 nm双波长Nd:YAG脉冲激光输出实验研究

根据计算得到的双波长激光振荡的阈值条件，激光实验中对全反镜镀制1 319和1 338 nm的全反膜（其反射率大于99.73%，而对1 064 nm激光的反射率约为7%）；输出镜采用对1 064 nm强谱线95%的高透过率，而对1 319和1 338 nm谱线的透过率分别为34.7%，32.5%，有效抑制了强线1 064 nm振荡，成功实现了1 319和1 338 nm Nd:YAG同时双波长激光脉冲输出。当输入能量为125 J时，1 319和1 338 nm脉冲双波长激光的单脉冲总输出能量为0.89 J，电-光转换效率为0.71%，斜率效率为0.89%。输出的双波长激光的中心波长分别在1 318.8和1 338.2 nm处，谱线宽度（FWHM）分别为0.35和0.48 nm，强度之比为36:44。

Output of 1 319 nm and 1 338 nm dual wavelength Nd:YAG pulse laser

On the basis of the calculation result of the simultaneous dual wavelength threshold condition, the reflectivities of reflection mirror were more than 99.73% at 1 318.8 nm and 1 338 nm wavelengths,but about 7% at 1 064 nm; the output mirror was coated with the transmissions of 34.7% and 32.5% at 1 319 nm and 1 338 nm, respectively, the transmittance of the output mirror was 95 % for 1 064 nm laser in the experiment. The strongest 1 064 nm line was effectively suppressed and a 1 319 nm and 1 338 nm dual wavelength Nd:YAG pulsed laser was successfully developed. The output energy of 0.89 J was obtained at the pump energy of 125 J with the total efficiency of 0.71% and the slope efficiency of 0.89%. The central wavelengths of the output laser are 1 318.8 nm and 1 338.2 nm with the FWHM of 0.3