Microwave Photonics-enabled High-sensitivity Demodulation Of Optical Fiber Fabry-Perot Interferometer Sensors

Abstract

Optical fiber sensors have become indispensable in a wide range of applications, with Fabry-Perot interferometers (FPIs) standing out for their compactness and versatility in sensor design. Microwave photonics (MWP) techniques offer enhanced performance and flexibility for advancing optical sensor interrogation methods. This paper presents a novel MWP-based interrogation technique, leveraging direct phase measurement for short-cavity FPI sensors. The method utilizes the phase response of the FPI sensor within an MWP-assisted radio frequency single bandpass filter, delivering improved sensitivity and dynamic sensing capabilities compared to conventional approaches. Experimental results confirm the effectiveness of the proposed technique for measuring both static and dynamic strains. The system achieves a high sensitivity of 0.00217 rad/μϵ and a resolution better than 100 nϵ at an operating frequency of 247.0 MHz.

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Farby-Perot interferometer; fiber optic sensors; microwave photonics; phase detection

International Standard Book Number (ISBN)

978-151068723-3

International Standard Serial Number (ISSN)

1996-756X; 0277-786X

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2025 Society of Photo-optical Instrumentation Engineers, All rights reserved.

Publication Date

01 Jan 2025

Link to Full Text

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