Correlation Demodulation for Low- Finesse Fabry-Pérot Sensors Based on Microwave Photonics
- Resource Type
- Periodical
- Authors
- Chen, Y.; Lei, X.; Ma, S.; Zhang, P.; Liu, X.
- Source
- Journal of Lightwave Technology J. Lightwave Technol. Lightwave Technology, Journal of. 42(10):3929-3935 May, 2024
- Subject
- Communication, Networking and Broadcast Technologies
Photonics and Electrooptics
Sensors
Interference
Demodulation
Correlation
Microwave frequencies
Light sources
Frequency modulation
Correlation demodulation
Fabry-Pérot sensor
microwave photonics
- Language
- ISSN
- 0733-8724
1558-2213
Microwave photonics technology is gaining increasing popularity in the realm of optical fiber sensing. A new Fabry-Pérot (FP) correlative demodulation technique combining microwave photonics technology (MWP) and frequency-swept light source (FSL) method is proposed. The demodulation of FP cavity length is operated by the correlation calculations between the interference frequency of the FP sensor and the microwave frequency. The fundamental theory of cross-correlation makes the FSL-MWP method highly resistant to noise. The frequency interval of the microwave signal generator (MSG) and high sweeping rate of the FSL leads to enhanced resolution and precision.