Distributional measurement of effective refractive index differences of multimode fibers by Brillouin spectrum decomposition

Masashi Yokota; Motoharu Miura; Hiroki Watanabe; Fumihiko Ito; Ryo Maruyama; Nobuo Kuwaki

doi:10.1117/12.2265447

23 April 2017 Distributional measurement of effective refractive index differences of multimode fibers by Brillouin spectrum decomposition

Masashi Yokota, Motoharu Miura, Hiroki Watanabe, Fumihiko Ito, Ryo Maruyama, Nobuo Kuwaki

Author Affiliations +

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 1032382 (2017) https://doi.org/10.1117/12.2265447
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

A novel method for distributionally evaluating the effective refractive index differences, Δn_eff, in multimode optical fibers is presented based on the Brillouin spectrum analysis. The proposed method is successfully demonstrated in GeO₂-doped step-index 2-mode fibers, for evaluating Δn_eff between LP₀₁ and LP₁₁ modes, and the method could be straightforwardly expanded to fibers containing higher-order modes, by using a mode demultiplexer supporting the higher-order mode. To the authors’ best knowledge, this is the first report of distributional measurements of the effective refractive index differences in multimode optical fibers.

Citation Download Citation

Masashi Yokota, Motoharu Miura, Hiroki Watanabe, Fumihiko Ito, Ryo Maruyama, and Nobuo Kuwaki "Distributional measurement of effective refractive index differences of multimode fibers by Brillouin spectrum decomposition", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032382 (23 April 2017); https://doi.org/10.1117/12.2265447

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