Open AccessLoss measurement of each mode in few-mode fiber links with crosstalk-inducing points based on optical time domain reflectometry
Author(s) -
Atsushi Nakamura,
Tomokazu Oda,
Daisuke Iida
Publication year - 2020
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.402836
Subject(s) - reflectometry , crosstalk , optics , waveform , optical fiber , time domain , optical time domain reflectometer , single mode optical fiber , multi mode optical fiber , materials science , polarization maintaining optical fiber , fiber optic sensor , computer science , physics , telecommunications , radar , computer vision
We propose a novel technique based on optical time domain reflectometry for characterizing the losses of transmission modes along few-mode fiber links. The technique estimates the transfer matrix at a crosstalk-inducing point from the measured backscattered waveforms and then eliminates the crosstalk influence of the point on the waveforms. Waveforms that are free from the crosstalk influence enable us to obtain the true losses independently of the crosstalk-inducing point. A proof-of-concept demonstration is performed on an optical fiber with a crosstalk-inducing splice and a bend, and the results show the usefulness of the proposed technique.