Orthogonal Phase Demodulation of Optical Fiber Fabry-Perot Interferometer Based on Birefringent Crystals and Polarization Technology
| Autor: | Huang Yi, Kun Liu, Shuang Wang, Peng Zhang, Xuezhi Zhang, Tiegen Liu, Junfeng Jiang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:Applied optics. Photonics
Optical fiber Physics::Optics 02 engineering and technology Cross-multiplication 01 natural sciences law.invention 010309 optics 020210 optoelectronics & photonics Optics law 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Demodulation lcsh:QC350-467 Electrical and Electronic Engineering Physics Birefringence business.industry Astrophysics::Instrumentation and Methods for Astrophysics lcsh:TA1501-1820 Polarization (waves) Atomic and Molecular Physics and Optics Vibration Interferometry Optical fiber Fabry-Perot interferometer orthogonal signals phase variation business birefringent crystals Fabry–Pérot interferometer lcsh:Optics. Light |
| Zdroj: | IEEE Photonics Journal, Vol 12, Iss 3, Pp 1-9 (2020) |
| ISSN: | 1943-0655 |
| Popis: | In this paper, we propose and demonstrate the optical fiber Fabry-Perot (F-P) interferometer based on birefringent crystals and polarization technology. For recovering the variation signals, the orthogonal signals are obtained based on the birefringent crystal characteristics and the proposal thickness difference between the two crystals. The differential cross multiplication (DCM) algorithm is utilized to demodulate the orthogonal signals to obtain the phase variation of the optical fiber F-P sensor. The proposed interferometer has a minimum detection phase of 0.014 $\text{rad}/\sqrt {\text{Hz}} $ at the frequency of 25 kHz. In the experiment, two kinds of vibration signals with frequencies of 25 kHz and 15 kHz are used and the proposed interferometer SNR is 70 dB and 75 dB under the corresponding reference environment respectively. The experiment results show that the proposed interferometer can realize the measurement of large dynamic signals and has high stability. The proposed interferometer has the advantages of fast demodulation and good environmental adaptability. |
| Databáze: | OpenAIRE |
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