Determination of the differential mode delay of a multimode fiber using Fourierdomain intermodal interference analysis

J. Y. Lee, D. Y. Kim

Research output: Contribution to journalArticle

20 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)9016-9021
Number of pages6
JournalOptics Express
Issue number20
Publication statusPublished - 2006 Oct


All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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