Abstract

Intensity-modulated optical fiber sensors (IM-OFSs) have garnered significant research interest due to their advantageous characteristics, including simplified fabrication procedures, cost-efficient systems, and straightforward signal demodulation, leading to their widespread application across diverse fields. Nevertheless, the multiplexing technique for IM-OFSs remains underexplored, primarily because isolating the contributions of individual sensors within the system using traditional power measurements poses a significant challenge. In this study, we introduce and experimentally validate a novel approach leveraging a simple microwave-photonic fiber ring resonator (MWP-FRR). This approach enables the concurrent interrogation of two IM-OFSs based on an in-and-out-of-ring-modulation (IORM) strategy. The transmission losses of both IM-OFSs are effectively encoded within the magnitude frequency response of the MWP-FRR, specifically its resonance spectrum in the microwave frequency range. By meticulously analyzing the fringe contrast and overall transmission of the MWP-FRR, changes in the transmission losses of the two IM-OFSs induced by external perturbations can be unambiguously identified. This work taps into the rich informational content embedded within the frequency response of the MWP-FRR via an IORM approach, revealing a novel strategy that can be harnessed to develop IM-OFS-based high-sensitivity and multi-parameter sensor networks.

Department(s)

Electrical and Computer Engineering

Publication Status

Early Access

Keywords and Phrases

curvature sensor; fiber optic sensors; intensity-modulated sensors; Microwave photonics; multiplexing

International Standard Serial Number (ISSN)

1558-1748; 1530-437X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2025 Institute of Electrical and Electronics Engineers, All rights reserved.

Publication Date

01 Jan 2025

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