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Proceedings Paper

Control of thermal effects with a Poincare sphere model and experimental validation on a polarimetric angular displacement sensor using telecom optical fiber as transducer
Author(s): Eric Gaumont; Ayoub Chakari; Patrick Meyrueis; Michel Clement
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Paper Abstract

The effects of a (Delta) T equals 300 K thermal perturbation is modelized theoretically in the case of a telecom singlemode optic fiber that we use as a transducer in an angular displacement polarimetric sensor. This model allows to optimize the fiber's spatial path and to select the light input polarization and the wavelength (lambda) in order to minimize the thermal modulation of the sensor signal. Therefore, the angular calibration error with (Delta) T equals 300 K will stay below 0.1 degrees with a 90 degree measurement range. We present two series of experiments where the wavelength is respectively (lambda) 1 equals 1300 nm and (lambda) 2 equals 780 nm. In the first case, we apply a thermal perturbation (Delta) T equals (293 K; 453 K). We observe a sensor signal fitting the one of the simulation, showing that experimental conditions are similar to the model ones. In the second case, (Delta) T equals (293 K; 213 K), we measure a greater thermal modulation of the sensors signal than the simulation one. This linear birefringence is due to the fiber's gluing on its substrate and to the fiber's mechanical homogeneity in the bent parts. These stresses will be minimized by adapted gluing and substrate materials and optic fiber's design selection.

Paper Details

Date Published: 13 August 1998
PDF: 7 pages
Proc. SPIE 3555, Optical and Fiber Optic Sensor Systems, (13 August 1998); doi: 10.1117/12.318207
Show Author Affiliations
Eric Gaumont, Univ. Louis Pasteur (France)
Ayoub Chakari, Univ. Louis Pasteur (France)
Patrick Meyrueis, Univ. Louis Pasteur (France)
Michel Clement, Societe Europeenne de Propulsion (France)

Published in SPIE Proceedings Vol. 3555:
Optical and Fiber Optic Sensor Systems
Shanglian Huang; Kim D. Bennett; David A. Jackson, Editor(s)

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