Frequency-domain intermodal interferometer for the bandwidth measurement of a multimode fiber

Tae Jung Ahn, Sucbei Moon, Soan Kim, Kyunghwan Oh, Dug Young Kim, Jens Kobelke, Kay Schuster, Johnnes Kirchhof

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


A new bandwidth measurement technique for a multimode optical fiber (MMF) using a frequency-domain intermodal interferometer is proposed. We have demonstrated that the relative modal delay (HMD) of a MMF can be obtained easily and accurately based on an optical frequency-domain reflectometry (OFDR) technique by using an intermodal interference signal among the excited modes of a MMF. As an example, a photonic crystal fiber with a few modes is prepared and its RMD is measured by using our proposed measurement technique. Measurement results are compared with those from a previously reported frequency-domain method. We have also measured the RMD of a commercial MMF as a practical application and compared our result with the one obtained from a well-known time-domain differential mode delay measurement technique.

Original languageEnglish
Pages (from-to)8238-8243
Number of pages6
JournalApplied Optics
Issue number32
Publication statusPublished - 2006 Nov 10

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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