Back to Search
Start Over
Distributed measurements of vibration frequency using phase-OTDR with a DFB laser self-stabilized through PM fiber ring cavity
- Source :
- Results in Physics, Vol 12, Iss , Pp 1840-1842 (2019)
- Publication Year :
- 2019
- Publisher :
- Elsevier, 2019.
-
Abstract
- 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
Details
- Language :
- English
- ISSN :
- 22113797
- Volume :
- 12
- Issue :
- 1840-1842
- Database :
- Directory of Open Access Journals
- Journal :
- Results in Physics
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.017b32f7a81d475ebfa7b79ceb8b0f4d
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.rinp.2019.02.023