Experimental measurement of the number of modes for a multimode optical fiber

Changhyeong Yoon, Youngwoon Choi, Moonseok Kim, Jungho Moon, Donggyu Kim, Wonshik Choi

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


For a multimode optical fiber, the number of modes (Nm) can be calculated by analytic theory when the fiber is straight, twist-free, and strain-free. In practice, however, the fiber is subject to distortions that modify its mode characteristics. In this Letter, we present an experimental method to interrogate the mode properties of a multimode optical fiber. We experimentally measured the transmission matrix of a multimode optical fiber and performed singular value decomposition. We proved, both theoretically and experimentally, that the rank of the transmission matrix is equal to N m. We expect that the suggested method will contribute to the fields of the biomedical optics and optical communications where optical fiber is widely used.

Original languageEnglish
Pages (from-to)4558-4560
Number of pages3
JournalOptics Letters
Issue number21
Publication statusPublished - 2012 Nov 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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