Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 35, Issue 4, Pages 650-657Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2016.2609002
Keywords
Optical fibers; optical fiber communication; optical fiber measurements
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When few-mode fibers are employed in mode-division multiplexing (MDM), mode coupling between the propagation modes must be suppressed. In this study, the impulse response for a two-mode fiber (TMF) is theoretically described to estimate the mode coupling in the fiber and at a splice point. We then propose a technique for measuring the mode-coupling coefficient in a TMF based on the impulse response technique. The mode-coupling behavior in a fiber and at splice points is measured experimentally using the proposed technique for several fabricated TMFs. We clarify the relationship between the effective-index difference Delta n(eff) between LP01 and LP11 modes and the mode-coupling coefficient h for our fabricated TMFs.
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