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Proceedings Paper

Mode-mode fiber interferometer with impact localization ability
Author(s): Oleg Kotov; Ivan Chapalo
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Paper Abstract

In this publication we investigate distributed mode-mode fiber interferometer (MFI) with ability of external impact localization. It is based on bidirectional continuous selective excitation of multimode fiber (MMF) with increasing of launched modes quantity along the MMF from excitation point to the opposite end of fiber. Two photo detection systems register output signals from both directions. MFI output signal characteristics such as amplitude and spectrum width depend on excited modes quantity at the point of perturbation. Thus, every fiber point is characterized by two opposite direction signal parameters. Calculating these parameters’ values makes it possible to localize the segment subjected by external impact. Experimental MFI setup include 3 MMF segments with 2 mode controllers among them which increase excited modes number from segment to segment. During the experiment, every MMF segment was subjected by arbitrary external perturbations and output signals were analyzed. Obtained results confirmed the ability of localization.

Paper Details

Date Published: 29 April 2016
PDF: 10 pages
Proc. SPIE 9899, Optical Sensing and Detection IV, 98992J (29 April 2016); doi: 10.1117/12.2227916
Show Author Affiliations
Oleg Kotov, Peter the Great Saint-Petersburg Polytechnical Univ. (Russian Federation)
Ivan Chapalo, Peter the Great Saint-Petersburg Polytechnical Univ. (Russian Federation)

Published in SPIE Proceedings Vol. 9899:
Optical Sensing and Detection IV
Francis Berghmans; Anna G. Mignani, Editor(s)

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