基于双光束干涉理论和维纳辛钦定理, 推导出宽谱光源干涉特性的表达式并进行了分析。提出了基于迈克尔逊干涉仪光路测量光源自相干函数的方法。在光学设计软件Zemax的混合序列模式下建立了宽谱光源自相干函数测试系统的光路模型, 通过多重结构编辑器对参考光路和测量光路进行了仿真。单独对准直系统进行了仿真, 通过优化使系统的光线准直效果达到最佳。并根据仿真建立的理论模型,从光纤纤芯大小和对准误差这两个角度分析了它们对光线准直系统准直度和整个系统耦合效率的影响, 得到对应的变化规律, 最后通过Origin软件绘制出了相应的变化曲线, 为搭建宽谱光源自相干函数测试系统提供了基础。

Based on the double beam interference theory and Wiener-Khinchin theorem, the coherence equation of broad spectrum light source was derived and analyzed. In the mixed sequence mode of optical design software Zemax, a coherence function test system of broad spectrum light source was established. The reference light path and the measuring light path were simulated by multi-configuration editor. Collimation system was simulated individually, and the system’s collimation degree achieves the best result by optimization. According to theoretical models, the effects of the fiber core size and alignment error on the collimation degree of collimation system and the coupling efficiency of the whole system were analyzed. Finally, the changing curve was drawn with the origin software.