在Nd：YAG强激光光场的作用下，薄膜样品中观察到二次谐波信号，并分析了二次谐波发生的机理。
The optical second harmonic signal was observed using a ND:YAG laser, The mechanism of SHG was discussed.
另外，SHG显微镜可以与TPF显微镜结合使用同一个激光源。可由二次谐波发生(SHG)显微镜提供形貌信息。
Additional morphological information can be provided by second-harmonic generation (SHG) microscopy, which can be combined with TPF microscopy using the same laser source.
研究结果发现，组合共振区域内发生两种不同的拟周期运动和组合周期运动，而且第一振型次谐波共振曲线延伸到组合共振区域。
The results obtained show that several motions may occur in the region of combination resonance, including two kinds of quasi-periodic vibrations and combined periodic motion.
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