相位屏法研究湍流大气对干涉图样的影响

基于马赫-泽德光路发射的相干光为模型,利用功率谱反演法生成随机相位屏的方法模拟湍流大气,分析了相干高斯光在湍流大气中的传输过程并建立了传输模型,推导得到了接收屏上的干涉光强。数值仿真分析了湍流大气对干涉图样分布以及条纹间距和对比度等特征参数的影响。结果表明,随着湍流强度增大,干涉图样变得模糊甚至破碎,条纹间距增大,对比度下降。此研究结果对于激光主动干涉探测技术的应用具有一定参考意义。

Influence of atmosphere turbulence on interference pattern by phase screen method

Taking the coherent laser based on Mach-Zehnder light path as the model,random phase screen is generated by the power spectrum method of inversion to simulate the atmospheric turbulence.The transmission of coherent Gauss beams in atmosphere turbulent was analyzed,and the transmission model was established,and the interference light intensity on the receiving screen is derived.The influences of atmosphere turbulence on the distribution of interference pattern and the characteristic parameters such as fringe spacing and contrast are analyzed by numerical simulation.The results show that with the increase of turbulence intensity,the interference pattern becomes blurred or even broken,the fringe spacing increases and the contrast ratio decreases.The results of this study have a certain reference value for the application of laser active interference detection technology.