Abstract

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 $\Delta n_{{\rm{eff}}}$ between ${\text{LP}}_{{01}}$ and ${\text{LP}}_{{11}}$ modes and the mode-coupling coefficient h for our fabricated TMFs.

© 2016 IEEE

Simultaneous measurement of mode dependent loss and mode coupling in few mode fibers by analyzing the Rayleigh backscattering amplitudes

Feng Liu, Guijun Hu, Congcong Song, Weicheng Chen, Cuiguang Chen, and Jiake Chen
Appl. Opt. 57(30) 8894-8902 (2018)

Optimized graded index two-mode optical fiber with low DMD, large A_eff and low bending loss

Kiminori Sato, Ryo Maruyama, Nobuo Kuwaki, Shoichiro Matsuo, and Masaharu Ohashi
Opt. Express 21(14) 16231-16238 (2013)

Analysis of characteristics of few-mode fiber fusion splicing under dynamic spatial modecrosstalk

Zhenxing He, Feng Liu, Wenping Zhang, Lixin Xu, and Guijun Hu
Appl. Opt. 60(30) 9432-9439 (2021)

Measurement of mode coupling distribution along a few-mode fiber using a synchronous multi-channel OTDR

Masataka Nakazawa, Masato Yoshida, and Toshihiko Hirooka
Opt. Express 22(25) 31299-31309 (2014)

Study of fabrication reproducibility of two-mode optical fibers for mode division multiplexing with MIMO processing

Ryo Maruyama, Masaharu Ohashi, Kimitaka Watanabe, Nori Shibata, Nobuo Kuwaki, and Shoichiro Matsuo
Opt. Express 26(9) 11100-11109 (2018)