铌酸钾(KNbO_3)晶体860nm和430nm倍频膜的研制

Investigation in SHG 860nm and 430nm of KNbO_3 Crystal

铌酸钾晶体 (简称KN)是非常重要的非线性光学晶体之一。通过镀膜 ,可以增加输出能量 ,提高倍频转换效率 ,使激光器的性能明显提高。本文着重研究了非线性光学晶体KNbO3在 86 0nm及 4 30nm处倍频膜的膜系设计。试验结果显示 ,在 86 0nm及 4 30nm处的透过率分别增加了 19.4个百分点和 14.3个百分点。

KNbO 3 is one of the most important nonlinear optical crystals.It can improve second harmonic generation (SHG) efficiency by coated film on KN crystal design.In this paper, a coating design for SHG of waverange 860nm to 430nm on nonlinear optical crystal——KNbO 3 crystal was investigated.The testing result shows that the transmissivity in wavelength 860 nm and 430nm increased 19.4%and 14.3%,respectively.