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.
| Original language | English |
|---|---|
| Pages (from-to) | 1840-1842 |
| Number of pages | 3 |
| Journal | Results in Physics |
| Volume | 12 |
| Early online date | 10 Feb 2019 |
| DOIs | |
| Publication status | Published - 1 Mar 2019 |
Bibliographical note
© 2019 Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license(http://creativecommons.org/licenses/BY-NC-ND/4.0/).
Keywords
- Frequency examination
- Phase-sensitive OTDR
- Self-injection locking
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