A tunable high resolution FBG demodulation system using photonic crystal fiber loop mirrors

Tatiana Bakhvalova; Ginu Rajan; Yuliya Semenova; Gerald Farrell

doi:10.1117/12.834145

5 October 2009 A tunable high resolution FBG demodulation system using photonic crystal fiber loop mirrors

Tatiana Bakhvalova, Ginu Rajan, Yuliya Semenova, Gerald Farrell

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75036Z (2009) https://doi.org/10.1117/12.834145
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

A tunable demodulation system for fiber Bragg grating sensors utilizing photonic crystal fiber loop mirrors (PC-FLM) in a ratiometric scheme is presented in this paper. The characterization of the demodulation system in two schemes is presented, a single loop PC-FLM and a two loop PC-FLM scheme. For the two loop scheme the length of the photonic crystal fiber must be optimized to achieve opposite slopes for a fixed wavelength range. A comparison of the performance of the system with a single fiber loop mirror and two fiber loop mirrors in a ratiometric scheme is also presented in this paper. The proposed system can be used as a tunable demodulation system to allow it to interrogate FBGs with different peak wavelengths. A tunable wavelength demodulation system is demonstrated with a single loop PC-FLM, with a wavelength range of 4 nm, a tuning range of 2 nm and a wavelength resolution of 2 pm.

Citation Download Citation

Tatiana Bakhvalova, Ginu Rajan, Yuliya Semenova, and Gerald Farrell "A tunable high resolution FBG demodulation system using photonic crystal fiber loop mirrors", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75036Z (5 October 2009); https://doi.org/10.1117/12.834145

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