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Recenzirano
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Maruyama, Ryo; Kuwaki, Nobuo; Matsuo, Shoichiro; Ohashi, Masaharu
Journal of lightwave technology, 2017-Feb.15,-15, 2017-2-15, Letnik: 35, Številka: 4Journal Article
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 Δ n eff between LP 01 and LP 11 modes and the mode-coupling coefficient h for our fabricated TMFs.
