Open AccessDetermination of the differential mode delay of a multimode fiber using Fourierdomain intermodal interference analysis
Author(s) -
J. Y. Lee,
D. Y. Kim
Publication year - 2006
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.009016
Subject(s) - optics , interferometry , multi mode optical fiber , interference (communication) , offset (computer science) , time domain , frequency domain , physics , optical fiber , optical path , computer science , telecommunications , channel (broadcasting) , computer vision , programming language
We present a novel differential mode delay (DMD) measurement method for a multimode optical fiber (MMF) based on Fourier-domain lowcoherence interferometry (fLCI) for the first time. An optical spectrum analyzer and a mode scrambler are used to obtain the intermodal interference signal in spectral domain after light passes an MMF. The MMF is used as a common path interferometer by itself without using any reference arm in an interferometer. Instead of using an offset launching technique, we present an effective method to obtain all available intermodal interference signals at a single shot by using a mode scrambler. The measured results using the proposed method are compared with those obtained using a conventional time-domain DMD measurement method.