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Computer Optics, 2017, Volume 41, Issue 3, Pages 385–390 (Mi co397)  

OPTO-IT

Experimental study of depolarization of laser radiation by fiber optic elements

S. A. Matyunin, O. G. Babaev

Samara National Reseach University, Samara, Russia

Abstract: At present, in polarization-based optical fiber sensors the optical fiber is used both as a sensitive element (SE) and as fiber-optic communication lines (FOCL) for transmission of an optical signal. In such sensors, the polarization axes of the optical radiation source (ORS) and SE need to be aligned. However, FOCL elements located between the ORS and SE introduce their own polarization distortions due to the anisotropy of the optical properties of the fiber resulting from bending deformations of a random nature. This leads to a decrease in the accuracy and repeatability of the polarization sensor (PS) measurements. The proposed method of polarization correction consists in depolarization (transformation into circular polarization) of optical radiation by placing coils with an optical fiber between the ORS and SE, and certain parameters: the diameter of the coil, the number of turns and the angle of rotation of the coil relative to the plane of polarization of the ORS. This method allows one to exclude from the optical setup expensive optical elements (for example, quarter-wave plates) and simplify the design of the sensor / measuring device. In the course of experimental studies it was found that in this way it is possible to reduce the polarization distortion from the initial 17 dB to 1.6 dB.

Keywords: fiber optic sensors, fiber optic communications, fiber measurements, polarization sensor, polarization correction, semiconductor lasers, optical fiber, bending deformations.

Funding Agency Grant Number
Ministry of Education and Science of the Russian Federation RFMEF157816X0209
The work is executed at financial support of the Ministry of Education and Science of the Russian Federation. Unique ID: Applied research and experimental work RFMEF157816X0209.


DOI: https://doi.org/10.18287/2412-6179-2017-41-3-385-390

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Full text: http://www.computeroptics.smr.ru/.../410311.html
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Received: 30.03.2017
Accepted:18.04.2017

Citation: S. A. Matyunin, O. G. Babaev, “Experimental study of depolarization of laser radiation by fiber optic elements”, Computer Optics, 41:3 (2017), 385–390

Citation in format AMSBIB
\Bibitem{MatBab17}
\by S.~A.~Matyunin, O.~G.~Babaev
\paper Experimental study of depolarization of laser radiation by fiber optic elements
\jour Computer Optics
\yr 2017
\vol 41
\issue 3
\pages 385--390
\mathnet{http://mi.mathnet.ru/co397}
\crossref{https://doi.org/10.18287/2412-6179-2017-41-3-385-390}


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