Volume 4, Issue 1 (1-2017)                   WJEPAS 2017, 4(1): 1-6 | Back to browse issues page

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G. Babaev O, A. Matyunin S. Experimental study of the polarization transformation of semiconductor lasers in fiber-optic elements of the optical polarization sensors. WJEPAS. 2017; 4 (1) :1-6
URL: http://wjepas.europeansp.org/article-15-136-en.html
Samara University, Moskovskoye shosse 34, Samara, 443086, Russia
Abstract:   (1002 Views)
At present, in fiber-optic sensors of polarization type the optical fiber is used both as the sensitive element (SE), and as the fiber-optical communication lines (FOCL) for transmitting of an optical signal. In such sensors there is the need to matching the polarization axes of the optical radiation source (ORS) and the SE. However, the FOCL elements located between ORS and SE are making their own polarizing distortions due to the anisotropy of optical properties of fiber resulting from bending deformations that have random character. This reduces the accuracy and repeatability of the polarization sensor (PS) measurements. The offered method of polarization correction consists in depolarization (transformation to circular polarization) of optical radiation by placing between ORS and SE optical fiber coil with certain parameters: diameter of the coil, number of rounds and an angle of the coil rotation relative to the plane of ORS polarization. This method allows to exclude from an optical path the expensive optical elements (for example, quarter-wave plates) and to simplify the design of the sensor/measuring device. During experiments it was found that in this way the polarization can be reduced from initial 17 dB to 0.8 dB. © 2016 The Authors. Published by European Science publishing Ltd. Selection and peer-review under responsibility of the Organizing Committee of European Science publishing Ltd.
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Type of Study: Research |
Received: 2019/08/8 | Accepted: 2019/08/8 | Published: 2019/08/8

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