Improved Sensitivity of Fiber Fabry-Perot Interferometer Based on Phase-Tracking Algorithm

Author

Chongjie Qi ; Minghong Yang ; Dongwen Lee ; Weijing Xie ; Jixiang Dai

Author_Institution

Nat. Eng. Lab. for Opt. Fiber Sensors, Wuhan Univ. of Technol., Wuhan, China

Volume

15

Issue

10

fYear

2015

fDate

Oct. 2015

Firstpage

5834

Lastpage

5838

Abstract

A novel signal-processing algorithm based on phase tracking in frequency domain of optical fiber Fabry-Perot interferometric spectrum is described. The concept was demonstrated with three fiber Fabry-Perot interferometers for relative humidity measurement. Experimental results show that the proposed method can yield optical path difference measurement with high resolution, especially in the lower range of absolute humidity under 2000 ppm.

Keywords

Fabry-Perot interferometers; fibre optic sensors; frequency-domain analysis; humidity measurement; humidity sensors; optical variables measurement; signal processing; frequency domain analysis; humidity measurement; optical fiber Fabry-Perot interferometric spectrum; optical path difference measurement; phase-tracking algorithm; signal-processing algorithm; Cavity resonators; Frequency-domain analysis; Humidity; Optical fiber sensors; Optical fibers; Optical interferometry; Fabry-Perot interferometer; Fabry-perot interferometer; Phase tracking; phase tracking; relative humidity measurement;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2015.2453435

Filename

7152819