Shibata Nori, Watanabe Kimitaka, Ohashi Masaharu, Maruyama Ryo, Aikawa Kazuhiko
Opt Lett. 2020 Sep 1;45(17):4750-4753. doi: 10.1364/OL.396444.
We provide a novel approach for estimating the modal and chromatic dispersions of the and modes traversing a two-mode fiber (TMF). A modal interferometer is used to measure the differential group delay (DGD) and chromatic dispersion for the two modes in the 1260-1360 nm telecommunication band. The measurement principle is based on an investigation of a transmitted spectrum through temporal decomposition by means of a Fourier transform. The diagnosis of the DGD and chromatic dispersion for the two modes is discussed theoretically and experimentally. The experimental results obtained here exactly match those obtained previously. The salient feature of the present method is that the modal interferometer configuration makes it possible to measure both the DGD and chromatic dispersion and also estimate the shape of optical pulses traversing a TMF.
我们提供了一种新颖的方法来估计穿过双模光纤（TMF）的基模和包层模的模式色散和色度色散。使用一个模式干涉仪来测量1260 - 1360 nm电信波段中两种模式的差分群时延（DGD）和色度色散。测量原理基于通过傅里叶变换进行时间分解来研究透射光谱。从理论和实验两方面讨论了两种模式的DGD和色度色散的诊断。此处获得的实验结果与先前获得的结果完全匹配。本方法的显著特点是模式干涉仪配置使得能够同时测量DGD和色度色散，还能估计穿过TMF的光脉冲的形状。
