介绍了利用9.3 μm脉冲TEACO2激光通过AgGaSe2晶体二次谐波产生(SHG)技术实现4.65 μm中红外波段激光输出的实验研究。根据非线性光学原理和倍频技术的基本要求，通过有针对性的技术手段选择TEACO2激光器的输出谱线并控制脉冲波形的时间分布，使之满足激光倍频实验对泵浦脉冲光源在波长和输出时间分布上的基本要求，并以此为基波光源进行了产生二次谐波的实验研究。实验结果显示，即使是相同的AgGaSe2倍频晶体材料，也会由于生产厂商的不同而具有完全不同的表面破坏阈值行为，而相同点是体损伤阈值均大于表面损伤阈值。实验获得倍频输出最大能量为12.9 mJ；倍频输出最高平均功率为940 mW。

Several experiments to obtain a mid-infrared 4.65 μm laser output with a Second Harmonic Generation (SHG) in AgGaSe2 crystals by a 9.3 μm pulsed TEACO2 laser were introduced. Based on the principles of nonlinear optics and laser frequency doubling, the spectral line and time shape of the pulsed TEA CO2 laser were selected and controlled,respectively, to meet the basic requirements of the pumping laser source for the wavelength and time distribution. Then taking the laser source as the fundamental wave, the research work on the SHG is performed. Experimental results show that the same AgGaSe2 crystals made by the different manufacturers displays the different surface damaged characteristics, but the bulk damaged thresholds form all the crystals are higter than their surface damaged thresholds.The experiment offers a frequency-doubled maximal single pulse energy of 12.9 mJ and an average power of 940 mW.