High-Stability PGC Demodulation Algorithm Based On a Reference Fiber-Optic Interferometer With Insensitivity to Phase Modulation Depth
| العنوان: | High-Stability PGC Demodulation Algorithm Based On a Reference Fiber-Optic Interferometer With Insensitivity to Phase Modulation Depth |
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| المؤلفون: | Wujun Zhang, Cheng Zuo, Dong Guang, Jinhui Shi, Benli Yu, Lei Gui, Xuqiang Wu |
| المصدر: | Journal of Lightwave Technology. 39:6968-6975 |
| بيانات النشر: | Institute of Electrical and Electronics Engineers (IEEE), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Amplitude modulation, Physics, Interferometry, Total harmonic distortion, SINAD, Demodulation, Interference (wave propagation), Algorithm, Frequency modulation, Phase modulation, Atomic and Molecular Physics, and Optics |
| الوصف: | An ameliorated phase generated carrier demodulation algorithm based on a reference interferometer is proposed. It is theoretically analyzed, numerically simulated, and experimentally verified in this paper. The method of matching the amplitude of the quadrature signal in the reference interferometer algorithm eliminates the harmonic distortion caused by modulation depth fluctuations, suppresses system noise, and improves system stability. In experiments, where the sensed signal amplitude is 0.68 rad, the frequency is 1 kHz, and the modulation depth ranges from 1.5 to 3.5 rad, the ameliorated algorithm has SINAD that reaches 24.5 dB, which is an average improvement of 7.9 dB over the PGC-DCM algorithm based on a reference interferometer and an average improvement of 3 dB over the PGC-Arctan algorithm based on a reference interferometer. The ameliorated algorithm achieves a THD of 0.451%, which consistently maintains the best level of the traditional PGC algorithm based on a reference interferometer. The method provides an effective reference for signal processing in practical applications of fiber-optic sensors. |
| تدمد: | 1558-2213 0733-8724 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::690117130e28c6cebbf63f01ae5ca3e0 https://doi.org/10.1109/jlt.2021.3107204 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........690117130e28c6cebbf63f01ae5ca3e0 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15582213 07338724 |
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