Abstract

A measurement system of differential mode group delay (DMGD) in few-mode fiber with correlation optical time-domain reflection was proposed. A photonic lantern used in the system can be utilized for mode separation and selection and can generate six LP modes: ${{\rm{LP}}_{01}},\;{{\rm{LP}}_{\rm 11a}},\;{{\rm{LP}}_{\rm 11b}},\;{{\rm{LP}}_{\rm 21a}},\;{{\rm{LP}}_{\rm 21b}}$, and ${{\rm{LP}}_{02}}$. The signal reflected by the end of the fiber is correlated with the data sequence sent, which realizes the single-ended measurement of 5 km few-mode fiber DMGD. This method is not destructive for detecting fiber transmission systems and is simple and easy to implement. It can be used for detecting fiber transmission characteristics in the mode-division multiplexing communication system.

© 2022 Optica Publishing Group

Measurement of differential mode group delay in few-mode fibers based on Fresnel reflection peaks

Aodi Pang, Guijun Hu, Yi Qin, and Haiyan Wang
Appl. Opt. 62(26) 7044-7049 (2023)

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)

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)

Fault detection sensitivity analysis and optimization of the few-mode fiber link under a dynamic spatial mode crosstalk cumulative effect

Ping Wu, Feng Liu, and Zhenxing He
Appl. Opt. 61(28) 8273-8280 (2022)

Design of an all-fiber mode power splitter for mode-division-multiplexing transmission

Cong Zhang and Lei Shen
Appl. Opt. 60(27) 8480-8484 (2021)