In-fiber Fabry Perot interferometer with narrow interference fringes for enhanced sensitivity in elastic wave detection
Document Type
Article
Publication Date
1-1-2019
Abstract
In this work, we have demonstrated using a pair of in-fiber Fabry-Perot interferometer (FPI) with matched Bragg wavelength and free spectral range (FSR) for elastic wave detection based on matched filter interrogation configuration. The cavity lengths of the FPI structures are deliberately made long to achieve small FSR to enhance their sensitivity to elastic wave pressure. It is found that the sensitivity of sensor to elastic wave pressure is linearly proportional to the FPI cavity length. This finding is in agreement with the theoretical analysis.
Keywords
Fiber Bragg grating, Fabry-Perot interferometer, Matched filter interrogation
Divisions
photonics
Funders
Fundamental Research Grant Scheme, Ministry of Education Malaysia (FRGS) ( FP033-2017A )
Publication Title
Optical Fiber Technology
Volume
53
Publisher
Elsevier