Multi-core fiber interferometer using spatial light modulators for measurement of the inter-core group index differences

We demonstrate an experimental technique to generate and measure arbitrary superpositions of core modes in a multi-core fiber. Two spatial light modulators couple the fundamental mode of a single-mode fiber with multiple-core modes of the MCF to constitute a Mach-Zehnder-type multi-path interferomet...

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Bibliographic Details
Published in:Optics express 2015-05, Vol.23 (10), p.12555-12561
Main Authors: Lee, Hee Jung, Moon, Han Seb, Choi, Sang-Kyung, Park, Hee Su
Format: Article
Language:English
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Summary:We demonstrate an experimental technique to generate and measure arbitrary superpositions of core modes in a multi-core fiber. Two spatial light modulators couple the fundamental mode of a single-mode fiber with multiple-core modes of the MCF to constitute a Mach-Zehnder-type multi-path interferometer. The phase tunability of each path is verified by comparing two-, three-, and four-path interference patterns with the theory. Interference fringes in the wavelength domain estimates the inter-core group index differences with a resolution of 10(-5) using a fiber length of 1 m.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.23.012555