J. Phys. III France
Volume 3, Numéro 9, September 1993
Page(s) 1835 - 1838
DOI: 10.1051/jp3:1993243
J. Phys. III France 3 (1993) 1835-1838

A vibration sensor, using telecommunication grade monomode fiber, immune to temperature variations

F. Pigeon, S. Pelissier, A. Mure-Ravaud, H. Gagnaire, , S. I. Hosain and C. Veillas

Laboratoire Traitement du Signal et Instrumentation, U.A. CNRS 842, Faculté des Sciences, 23 rue du Docteur Paul Michelon, 42023 Saint-Etienne Cedex 2, France

(Received 14 June 1993, accepted 4 August 1993)

A polarimetric fiber-optic vibration sensor immune to temperature variations is realized by forming coils using a standard single-mode fiber. The phase drift due to the linear birefringence changes induced by a modification of the environmental temperature is balanced by a feedback compression of a non vibrating coil. Experimental results show that without the feedback system the sensitivity to temperature is equal to 2%/°C. The compensated device has a maximum 10% relative variation of the output signal over a 30-55 °C range. This method is easy to implement on polarimetric sensors over any range of temperature.

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