Using an Auxiliary Mach–Zehnder Interferometer to Compensate for the Influence of Laser-Frequency-Drift in Φ-OTDR
In phase-sensitive optical time-domain reflectometry (Φ-OTDR), the frequency drift of the laser source induces the fluctuation of signal, which limits the measurement capacity of Φ-OTDR for low frequency severely. In this paper, we propose a method to compensate for the influen...
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IEEE
2019-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8556000/ |
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| author | Quan Yuan Feng Wang Tao Liu Yixin Zhang Xuping Zhang |
| author_facet | Quan Yuan Feng Wang Tao Liu Yixin Zhang Xuping Zhang |
| author_sort | Quan Yuan |
| collection | DOAJ |
| description | In phase-sensitive optical time-domain reflectometry (Φ-OTDR), the frequency drift of the laser source induces the fluctuation of signal, which limits the measurement capacity of Φ-OTDR for low frequency severely. In this paper, we propose a method to compensate for the influence of the frequency drift by using an auxiliary Mach–Zehnder interferometer (MZI). In this method, the signal of the auxiliary MZI is received to monitor the frequency drift continuously, and then, to correct the signal obtained from the sensing path. In the experiment, a vibration with a 0.1-Hz frequency on a 6-km sensing fiber is detected with a 10-m spatial resolution and the sensitivity is estimated to be <inline-formula><tex-math notation="LaTeX">$5.9\;\text{n}\varepsilon $</tex-math></inline-formula>. This method will expand the scope of application of Φ-OTDR in the fields that require high sensitivity and low frequency response. |
| format | Article |
| id | doaj-art-2a510e1bfeba4cf69102d9b1b464319b |
| institution | DOAJ |
| issn | 1943-0655 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-2a510e1bfeba4cf69102d9b1b464319b2025-08-20T03:15:48ZengIEEEIEEE Photonics Journal1943-06552019-01-011111910.1109/JPHOT.2018.28846598556000Using an Auxiliary Mach–Zehnder Interferometer to Compensate for the Influence of Laser-Frequency-Drift in Φ-OTDRQuan Yuan0Feng Wang1https://orcid.org/0000-0001-7409-217XTao Liu2Yixin Zhang3Xuping Zhang4Key Laboratory of Intelligent Optical Sensing and Manipulation, Ministry of Education, Nanjing University, Nanjing, ChinaKey Laboratory of Intelligent Optical Sensing and Manipulation, Ministry of Education, Nanjing University, Nanjing, ChinaKey Laboratory of Intelligent Optical Sensing and Manipulation, Ministry of Education, Nanjing University, Nanjing, ChinaKey Laboratory of Intelligent Optical Sensing and Manipulation, Ministry of Education, Nanjing University, Nanjing, ChinaKey Laboratory of Intelligent Optical Sensing and Manipulation, Ministry of Education, Nanjing University, Nanjing, ChinaIn phase-sensitive optical time-domain reflectometry (Φ-OTDR), the frequency drift of the laser source induces the fluctuation of signal, which limits the measurement capacity of Φ-OTDR for low frequency severely. In this paper, we propose a method to compensate for the influence of the frequency drift by using an auxiliary Mach–Zehnder interferometer (MZI). In this method, the signal of the auxiliary MZI is received to monitor the frequency drift continuously, and then, to correct the signal obtained from the sensing path. In the experiment, a vibration with a 0.1-Hz frequency on a 6-km sensing fiber is detected with a 10-m spatial resolution and the sensitivity is estimated to be <inline-formula><tex-math notation="LaTeX">$5.9\;\text{n}\varepsilon $</tex-math></inline-formula>. This method will expand the scope of application of Φ-OTDR in the fields that require high sensitivity and low frequency response.https://ieeexplore.ieee.org/document/8556000/Optical fiber sensorfrequency-driftphase-sensitive optical time domain reflectometryvibration measurement |
| spellingShingle | Quan Yuan Feng Wang Tao Liu Yixin Zhang Xuping Zhang Using an Auxiliary Mach–Zehnder Interferometer to Compensate for the Influence of Laser-Frequency-Drift in Φ-OTDR IEEE Photonics Journal Optical fiber sensor frequency-drift phase-sensitive optical time domain reflectometry vibration measurement |
| title | Using an Auxiliary Mach–Zehnder Interferometer to Compensate for the Influence of Laser-Frequency-Drift in Φ-OTDR |
| title_full | Using an Auxiliary Mach–Zehnder Interferometer to Compensate for the Influence of Laser-Frequency-Drift in Φ-OTDR |
| title_fullStr | Using an Auxiliary Mach–Zehnder Interferometer to Compensate for the Influence of Laser-Frequency-Drift in Φ-OTDR |
| title_full_unstemmed | Using an Auxiliary Mach–Zehnder Interferometer to Compensate for the Influence of Laser-Frequency-Drift in Φ-OTDR |
| title_short | Using an Auxiliary Mach–Zehnder Interferometer to Compensate for the Influence of Laser-Frequency-Drift in Φ-OTDR |
| title_sort | using an auxiliary mach x2013 zehnder interferometer to compensate for the influence of laser frequency drift in x03a6 otdr |
| topic | Optical fiber sensor frequency-drift phase-sensitive optical time domain reflectometry vibration measurement |
| url | https://ieeexplore.ieee.org/document/8556000/ |
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