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Proceedings Paper

Optical refractometer based on high birefringence Bragg grating Fabry-Perot cavity
Author(s): C. Jesus; O. Frazão; P. A. S. Jorge; J. M. Baptista
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Paper Abstract

An optical fibre sensor for simultaneous measurement of refractive index and temperature is presented. The refractive index measurement is based on the visibility variations of a Fabry- Perot interferometer with interfering waves generated in a low reflectivity Bragg grating inscribed on a Panda fibre and in the fibre tip (Fresnel reflection) in contact with the liquid. The temperature measurement is based on the wavelength shift of the FBG peaks. Results obtained show the feasibility of simultaneous measurement of refractive index and temperature and also the possibility of adjusting fringe visibility via polarization control.

Paper Details

Date Published: 8 September 2010
PDF: 4 pages
Proc. SPIE 7653, Fourth European Workshop on Optical Fibre Sensors, 76530O (8 September 2010); doi: 10.1117/12.866613
Show Author Affiliations
C. Jesus, INESC Porto (Portugal)
Univ. da Madeira (Portugal)
O. Frazão, INESC Porto (Portugal)
P. A. S. Jorge, INESC Porto (Portugal)
J. M. Baptista, Univ. da Madeira (Portugal)
INESC Porto (Portugal)


Published in SPIE Proceedings Vol. 7653:
Fourth European Workshop on Optical Fibre Sensors
José Luís Santos; Brian Culshaw; José Miguel López-Higuera; William N. MacPherson, Editor(s)

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