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当调ＱＹＡＧ脉冲激光在ＬｉＩＯ３晶体中产生倍频时，由于部分基频光转换成倍频光，激光在倍频晶体中产生的光声信号将会增强，并随晶体的倍频位相失配角变化。报道了有关的实验结果，并进行了分析。
When the QYAG pulsed laser produces the frequency doubling in the LiIO3 crystal, the photoacoustic signal generated by the laser in the frequency doubling crystal will be enhanced due to the conversion of part of the fundamental frequency light to the frequency doubling light, and will vary with the frequency-doubling phase mismatch angle of the crystal . Relevant experimental results were reported and analyzed.