High SNR Φ-OTDR Based on Frequency and Wavelength Diversity With Differential Vector Aggregation Method
Phase-demodulated phase-sensitive time domain reflectometer (Φ-OTDR) has attracted much attention because of its linear relationship between the phase variation and the amplitude of the vibration. However, it suffers from limited signal-to-noise ratio (SNR) and signal fading, due to the i...
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| Format: | Article |
| Language: | English |
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IEEE
2020-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/9250491/ |
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| author | Jinfeng Gu Bin Lu Junqi Yang Zhaoyong Wang Lei Ye Qing Ye Ronghui Qu Haiwen Cai |
| author_facet | Jinfeng Gu Bin Lu Junqi Yang Zhaoyong Wang Lei Ye Qing Ye Ronghui Qu Haiwen Cai |
| author_sort | Jinfeng Gu |
| collection | DOAJ |
| description | Phase-demodulated phase-sensitive time domain reflectometer (Φ-OTDR) has attracted much attention because of its linear relationship between the phase variation and the amplitude of the vibration. However, it suffers from limited signal-to-noise ratio (SNR) and signal fading, due to the inherent low Rayleigh scattering coefficient and randomly spatial non-uniform distribution of the refractive index. Here, a Φ-OTDR system based on wavelength diversity is demonstrated, which can enhance the SNR and reduce signal fading simultaneously by using differential vector aggregation method. A theoretical model is built, and the linear relationship between SNR improvement and diversity scale is analyzed. The verification experiment is conducted, and in the further experiments, the frequency and wavelength diversity technology are cascaded to achieve a diversity scale of 20. After differential vector aggregation method, the external disturbance signal is well reconstructed and the noise floor is reduced by 13.4 dB, which is basically consistent with the theoretical analysis. |
| format | Article |
| id | doaj-art-13e58a79dfe8448085d1b37ba0d34a77 |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-13e58a79dfe8448085d1b37ba0d34a772025-08-20T03:30:57ZengIEEEIEEE Photonics Journal1943-06552020-01-0112611210.1109/JPHOT.2020.30364889250491High SNR Φ-OTDR Based on Frequency and Wavelength Diversity With Differential Vector Aggregation MethodJinfeng Gu0https://orcid.org/0000-0002-4250-3357Bin Lu1Junqi Yang2Zhaoyong Wang3https://orcid.org/0000-0003-0235-5596Lei Ye4Qing Ye5Ronghui Qu6Haiwen Cai7Key Laboratory of Space Laser Communication and Detection Technology, Shanghai, Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, ChinaKey Laboratory of Space Laser Communication and Detection Technology, Shanghai, Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, ChinaKey Laboratory of Space Laser Communication and Detection Technology, Shanghai, Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, ChinaKey Laboratory of Space Laser Communication and Detection Technology, Shanghai, Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, ChinaKey Laboratory of Space Laser Communication and Detection Technology, Shanghai, Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, ChinaKey Laboratory of Space Laser Communication and Detection Technology, Shanghai, Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, ChinaKey Laboratory of Space Laser Communication and Detection Technology, Shanghai, Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, ChinaKey Laboratory of Space Laser Communication and Detection Technology, Shanghai, Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, ChinaPhase-demodulated phase-sensitive time domain reflectometer (Φ-OTDR) has attracted much attention because of its linear relationship between the phase variation and the amplitude of the vibration. However, it suffers from limited signal-to-noise ratio (SNR) and signal fading, due to the inherent low Rayleigh scattering coefficient and randomly spatial non-uniform distribution of the refractive index. Here, a Φ-OTDR system based on wavelength diversity is demonstrated, which can enhance the SNR and reduce signal fading simultaneously by using differential vector aggregation method. A theoretical model is built, and the linear relationship between SNR improvement and diversity scale is analyzed. The verification experiment is conducted, and in the further experiments, the frequency and wavelength diversity technology are cascaded to achieve a diversity scale of 20. After differential vector aggregation method, the external disturbance signal is well reconstructed and the noise floor is reduced by 13.4 dB, which is basically consistent with the theoretical analysis.https://ieeexplore.ieee.org/document/9250491/Fiber optics sensorsΦ-OTDRRayleigh backscatteringSNRwavelength diversity |
| spellingShingle | Jinfeng Gu Bin Lu Junqi Yang Zhaoyong Wang Lei Ye Qing Ye Ronghui Qu Haiwen Cai High SNR Φ-OTDR Based on Frequency and Wavelength Diversity With Differential Vector Aggregation Method IEEE Photonics Journal Fiber optics sensors Φ-OTDR Rayleigh backscattering SNR wavelength diversity |
| title | High SNR Φ-OTDR Based on Frequency and Wavelength Diversity With Differential Vector Aggregation Method |
| title_full | High SNR Φ-OTDR Based on Frequency and Wavelength Diversity With Differential Vector Aggregation Method |
| title_fullStr | High SNR Φ-OTDR Based on Frequency and Wavelength Diversity With Differential Vector Aggregation Method |
| title_full_unstemmed | High SNR Φ-OTDR Based on Frequency and Wavelength Diversity With Differential Vector Aggregation Method |
| title_short | High SNR Φ-OTDR Based on Frequency and Wavelength Diversity With Differential Vector Aggregation Method |
| title_sort | high snr x03a6 otdr based on frequency and wavelength diversity with differential vector aggregation method |
| topic | Fiber optics sensors Φ-OTDR Rayleigh backscattering SNR wavelength diversity |
| url | https://ieeexplore.ieee.org/document/9250491/ |
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