为了解决空空导弹用红外激光引信易受烟雾干扰的问题，试制了高重复频率、高功率GaN基紫光激光器，利用瑞利散射原理和分子散射原理，分析了烟雾散射和飞机目标散射的差异性。在计算双色激光器对烟雾散射差异主要机理的基础上，在固定空间箱体建立的烟雾室内，利用紫光激光器和红外激光器形成的双色激光器及锁相放大电路，对烟雾进行了双色激光散射特性的测试，得到了相同烟雾状态下两个波长激光的烟雾散射比大于3的测试结果。对比理论计算结果和试验数据结果，确认紫光激光器可用于激光引信抗烟雾干扰，分析该抗干扰效果在烟雾浓度大时尤其明显。

The scattering theories of molecules and Rayleigh are applied in the analysis of the deference between fog to solid targets. And GaN-based blue-violet laser diodes and infrared diodes are compounded to a dual-wavelength diodes array. The dual-wavelength diode is used to test the deferent scatterings character of the fog. And for this measurement, a phase-locked circuit is also used. The scattering-ratio of the GaN-based blue-violet laser diodes and infrared diodes is more than 3. Therefore, the GaN-based blue-violet laser diodes can be used in anti-interference from fog for laser proximity-fuse. The thicker of the fog density, the effect is more significant.