Distributed measurements of vibration frequency using phase-OTDR with a DFB laser self-stabilized through PM fiber ring cavity
| Autor: | C. A. López-Mercado, Marc Wuilpart, J. L. Bueno Escobedo, Dmitry A. Korobko, Vasily V. Spirin, Patrice Mégret, Andrei A. Fotiadi, Johan Jason, I. O. Zolotovskiy |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Distributed feedback laser Optical fiber Materials science business.industry Physics::Optics General Physics and Astronomy Polarization-maintaining optical fiber 02 engineering and technology Optical time-domain reflectometer 021001 nanoscience & nanotechnology 01 natural sciences lcsh:QC1-999 law.invention Laser linewidth Resonator Optics law Fiber laser 0103 physical sciences 0210 nano-technology business Reflectometry lcsh:Physics |
| Zdroj: | Results in Physics, Vol 12, Iss, Pp 1840-1842 (2019) |
| ISSN: | 2211-3797 |
| DOI: | 10.1016/j.rinp.2019.02.023 |
| Popis: | We have evaluated the performance of a phase-sensitive optical time domain reflectometry (φ-OTDR) system for vibration measurements utilizing a conventional telecom DFB laser self-stabilized through an external PM optical fiber ring resonator. This low-cost solution is directly compared with the use of a commercial, ultra-narrow linewidth (∼100 Hz) fiber laser implemented into the same setup. Both systems are tested for measurement of the frequency of vibration applied to a fiber at a distance of 3500 m. The obtained SNR value higher than 6 dB demonstrates the ability of the DFB laser to perform distributed measurements of vibrations with frequencies up to 5600 Hz with a spatial resolution of 10 m. Keywords: Phase-sensitive OTDR, Self-injection locking, Frequency examination |
| Databáze: | OpenAIRE |
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