中红外砷酸钛氧钾光参变振荡器的实验研究

为了得到高能量中红外激光输出,对电光调Q灯抽运1064nm Nd:YAG抽运复合腔砷酸钛氧钾(KTA)光学参变振荡器(OPO)作了实验研究,在工作频率1Hz时得到OPO输出单脉冲能量6mJ,信号光脉宽10ns,闲频光波长407nm,能量11mJ.在5Hz～40Hz范围单脉冲能量随重复频率增高而降低.实验中采用的复合腔抽运技术有利于提高转换效率,降低起振阈值.使用上述光源对中红外成像器件作实验,在成像系统监视器上观察到激光光斑.这一结果对中红外激光器的研究是有帮助的.

Experimental study of a kalium titanyl arsenate optical parametric oscillator in the mid-infrared band

For the propose of finding high energy mid-infrared laser output,a compound cavity kalium titanyl arsenate(KTA)optical parametric oscillator(OPO)pumped by an electro-optic Q-switched flash-lamp-pumped 1064nm Nd∶YAG laser was experimentally studied. Single pulse energy of 36mJ of the OPO was obtained at a repetition rate of 1Hz,where the idler pulse energy was 11mJ at 3407nm wavelength with pulse width of 10ns. The pulse energy decreased with increasing the repetition rate within the range of 5 Hz～40Hz. The experimental result shows that the compound cavity pumping technology has the advantage of enhancing conversion efficiency and reducing oscillator threshold. With a mid-infrared image apparatus illuminated by the OPO,the laser spot was observed from the monitor of the image system. This result is useful for mid-infrared laser study.