High-temperature optical sensor based in high birefringence regenerated FBGs and a simple interrogation scheme

D. Barrera; S. Sales

doi:10.1117/12.2026696

20 May 2013 High-temperature optical sensor based in high birefringence regenerated FBGs and a simple interrogation scheme

D. Barrera, S. Sales

Author Affiliations +

Proceedings Volume 8794, Fifth European Workshop on Optical Fibre Sensors; 87941K (2013) https://doi.org/10.1117/12.2026696
Event: Fifth European Workshop on Optical Fibre Sensors, 2013, Krakow, Poland

Abstract

We present the fabrication and characterization of regenerated fiber Bragg gratings (RFBG) in high-birefringence optical fiber for high-temperature sensing. The RFBG presents two Bragg resonances corresponding to the slow and fast axis of the optical fiber. The distance between these two Bragg resonances can be used to reduce the cost of the interrogation unit. Two optical filters are used to convert the wavelength shift due to temperature into optical power changes. The use of modal interferometers for the optical filters simplifies the interrogation setup since they can be easily tuned by strain or temperature.

Citation Download Citation

D. Barrera and S. Sales "High-temperature optical sensor based in high birefringence regenerated FBGs and a simple interrogation scheme", Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87941K (20 May 2013); https://doi.org/10.1117/12.2026696

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