Open AccessFault detection sensitivity enhancement based on high-order spatial mode trend filtering for few-mode fiber link
Author(s) -
Feng Liu,
Wenping Zhang,
Ping Wu,
Zhengxing He
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.416098
Subject(s) - optical time domain reflectometer , fault detection and isolation , computer science , sensitivity (control systems) , optics , mode scrambler , multi mode optical fiber , electronic engineering , optical fiber , fiber optic sensor , telecommunications , physics , polarization maintaining optical fiber , engineering , artificial intelligence , plastic optical fiber , actuator
In this paper, we propose and experimentally verify a method for optimizing the fault detection sensitivity of few mode fiber (FMF) link based on high-order spatial mode trend filtering. The employment of high-order mode trend filtering as a signal processing tool identifies meaningful level shifts from FMF optical time-domain reflectometer (FMF-OTDR) profile, which is associated with the problem of the minimization of the intrinsic random noise and modal crosstalk impact on the acquired data. A FMF link fault detection system is built, and the proposed method is utilized to detect the fault loss characteristics of 7.2 km 6-mode fiber with three fusion splice points with different fusion quality, and the detection results of each mode are compared with the results obtained by FMF-OTDR. The experimental results show that our proposed method can effectively improve the low fault detection sensitivity of high-order spatial mode caused by random noise and mode crosstalk.