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

Tatiana Bakhvalova*, Ginu Rajan, Yuliya Semenova, Gerald Farrell

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

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.

Original languageEnglish
Title of host publication20th International Conference on Optical Fibre Sensors
DOIs
Publication statusPublished - 2009
Externally publishedYes
Event20th International Conference on Optical Fibre Sensors - Edinburgh, United Kingdom
Duration: 5 Oct 20099 Oct 2009

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7503
ISSN (Print)0277-786X

Conference

Conference20th International Conference on Optical Fibre Sensors
Country/TerritoryUnited Kingdom
CityEdinburgh
Period5/10/099/10/09

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