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Proceedings Paper

Fibre optic Sagnac interferometer as sensor of the SOP changes
Author(s): P. Marć; L. R. Jaroszewicz; Z. Krajewski
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Paper Abstract

The fiber-optic Sagnac interferometer (FOSI) has many useful applications begin from gyro up to wide range of sensors for measurement of different physical quantities. In this paper a new its application as a sensor of the state of polarization (SOP) changes is presented. The optical part of system is based on minimum gyro configuration, however a high level polarizer is replaced by specialized polarization filter with 3dB extinction ratio. The coherence and Jones matrix formalism for the system description were applied. Utilized in the system a fiber-optic phase modulator allow measuring the SOP changes by comparison appropriate harmonic amplitudes of the output signal. Additionally, two "dead ends" of the FOSI are used for system stabilization as well as an input intensity control. This system is dedicated for easy and active stabilization of the SOP in the fiber-optic devices where the polarization fading is a main disadvantage.

Paper Details

Date Published: 22 April 2006
PDF: 8 pages
Proc. SPIE 6189, Optical Sensing II, 618908 (22 April 2006); doi: 10.1117/12.663137
Show Author Affiliations
P. Marć, FEMTO-ST (France)
Military Univ. of Technology (Poland)
L. R. Jaroszewicz, Military Univ. of Technology (Poland)
Z. Krajewski, Military Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 6189:
Optical Sensing II
Brian Culshaw; Anna G. Mignani; Hartmut Bartelt; Leszek R. Jaroszewicz, Editor(s)

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