Fiber optic refractive index sensor based on π-phase shifted fiber Bragg grating fabricated on etched side-hole fiber

Qi Zhang; Lingling Hu; Jiajun Tian; Natale J. Ianno; Ming Han

doi:10.1117/12.2018265

29 May 2013 Fiber optic refractive index sensor based on π-phase shifted fiber Bragg grating fabricated on etched side-hole fiber

Qi Zhang, Lingling Hu, Jiajun Tian, Natale J. Ianno, Ming Han

Author Affiliations +

Proceedings Volume 8722, Fiber Optic Sensors and Applications X; 87220R (2013) https://doi.org/10.1117/12.2018265
Event: SPIE Defense, Security, and Sensing, 2013, Baltimore, Maryland, United States

Abstract

In this paper, we present a temperature-insensitive refractive index sensor based on π-phase-shifted Bragg gratings fabricated on side-hole fibers processed by wet chemical etching technique. The reflection spectrum of the π-phase shifted gratings on etched side-hole fiber features two notches with large spectral separation, which was used for refractive index (RI) detection in our application. The relative spectral notch separation exhibited a RI sensitivity of −278.5 pm/RIU (RIU: RI unit). Theoretical simulation obtained the temperature sensitivity of −0.00241 pm/°C, and experimental results also showed little sensitivity to temperature of our RI sensor.

Citation Download Citation

Qi Zhang, Lingling Hu, Jiajun Tian, Natale J. Ianno, and Ming Han "Fiber optic refractive index sensor based on π-phase shifted fiber Bragg grating fabricated on etched side-hole fiber", Proc. SPIE 8722, Fiber Optic Sensors and Applications X, 87220R (29 May 2013); https://doi.org/10.1117/12.2018265

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