In this paper, we present a modification of one of the common systems for producing multiple-beam fringes of equal chromatic order (FECO). This modification allows us to capture two FECO patterns of different polarizations simultaneously during dynamic investigations of fibers. Using this modified system, the dispersion curves in cases of parallel and perpendicular polarizations can be measured simultaneously. Also, dispersion of birefringence values along the visible spectrum can be calculated using a single FECO pattern.

中文翻译：

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等色阶双图像多光束条纹用于光纤的动态表征

在本文中，我们提出了一种用于生产等色阶多光束条纹（FECO）的常见系统的改进方案。这种修改使我们能够在动态研究光纤的同时捕获两个不同偏振的FECO模式。使用这种改进的系统，可以同时测量平行和垂直极化情况下的色散曲线。同样，可以使用单个FECO模式计算沿可见光谱的双折射值的色散。