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采用光波耦合器和被动锁模微微秒Nd:YAG激光束,在真空沉积的硫化锌波导薄膜中,实现了基波TE3(ω)模式与二次谐波TE3(2ω)模式之间的相位匹配。并同时观察到了三次谐波光谱。它们的光谱曲线的半高全宽分别为1.3?和1.4?。在基波入射功率为20MW的情况下,二次谐波的转换效率达1.8×10-3。In ZnS waveguide thin film, using the possitively mode-looked ps (aser beam and light wave coupler, phase matching between foundamental mode TE3(ω) and second harmonic mode TE3(2ω) has been obtained and third harmonic spectra was also observed. The width of the spectral curve were 1.3 and 1.4? respectively. The conversion efficiency of second harmonic is 1.8×10-3 while the incident foundamental power is 20 MW.
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