FBG-microfiber-FBG cascade Fabry-Perot interferometer for simultaneous measurement of temperature and refractive index

Jiejun Zhang; Qizhen Sun; Ruibing Liang; Jianghai Wo; Deming Liu

doi:10.1117/12.970390

7 November 2012 FBG-microfiber-FBG cascade Fabry-Perot interferometer for simultaneous measurement of temperature and refractive index

Jiejun Zhang, Qizhen Sun, Ruibing Liang, Jianghai Wo, Deming Liu

Author Affiliations +

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84217S (2012) https://doi.org/10.1117/12.970390
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

A microfiber Fabry-Perot interferometer (FPI) which employs two fiber Bragg Gratings (FBGs) as reflection mirrors and a short length microfiber as its cavity is proposed and fabricated. Theoretic study shows that the reflection spectrum of such microfiber FPI is consisted of two parts - interference fringes induced by FPI and reflection band induced by FBGs. Temperature affects both parts while ambient refractive index only influences the first part, i.e. microfiber FPI has different response to temperature and RI. Therefore, Dual-parameter measurement is experimentally demonstrated by tracking the FSR variation and the central wavelength shift of the reflection spectrum of microfiber FPI.

Citation Download Citation

Jiejun Zhang, Qizhen Sun, Ruibing Liang, Jianghai Wo, and Deming Liu "FBG-microfiber-FBG cascade Fabry-Perot interferometer for simultaneous measurement of temperature and refractive index", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84217S (7 November 2012); https://doi.org/10.1117/12.970390

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