Title :
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
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;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2015.2453435
