Optical refractometer based on high birefringence Bragg grating Fabry-Perot cavity

C. Jesus; O. Frazão; P. A. S. Jorge; J. M. Baptista

doi:10.1117/12.866613

8 September 2010 Optical refractometer based on high birefringence Bragg grating Fabry-Perot cavity

C. Jesus, O. Frazão, P. A. S. Jorge, J. M. Baptista

Proceedings Volume 7653, Fourth European Workshop on Optical Fibre Sensors; 76530O (2010) https://doi.org/10.1117/12.866613
Event: (EWOFS'10) Fourth European Workshop on Optical Fibre Sensors, 2010, Porto, Portugal

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.

Citation Download Citation

C. Jesus, O. Frazão, P. A. S. Jorge, and J. M. Baptista "Optical refractometer based on high birefringence Bragg grating Fabry-Perot cavity", Proc. SPIE 7653, Fourth European Workshop on Optical Fibre Sensors, 76530O (8 September 2010); https://doi.org/10.1117/12.866613

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