| Autor: |
Yiyang Luo, Li Xia, Di Huang, Zhilin Xu, Wei Li, Qizhen Sun, Deming Liu |
| Jazyk: |
angličtina |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
IEEE Photonics Journal, Vol 7, Iss 1, Pp 1-7 (2015) |
| Druh dokumentu: |
article |
| ISSN: |
1943-0655 |
| DOI: |
10.1109/JPHOT.2014.2381653 |
| Popis: |
We propose a quasi-distributed sensing system using optical spectrum-limited chaos for strain measurement with a high spatial resolution of locating. An optical bandpass filter is programmed in accordance with each sensor to implement the intensity demodulation of multiple chirped fiber Bragg gratings (FBGs). A cross-correlation algorithm is adopted in this sensing scheme. Consequently, strain sensing and locating can be simultaneously demodulated by the relative amplitude change (RAC) and time delay of a certain cross-correlation peak. Meanwhile, fiber fault monitoring can also be implemented by the cross-correlation algorithm, and an additional optical passband is reserved for sufficient breakpoint testing optical power. The proof-of-concept experiment demonstrates that the strain sensitivity reaches 0.12% RAC/ $\mu\varepsilon$, and the spatial resolution is up to 3.3 cm. Finally, the performance of fiber fault monitoring is also demonstrated. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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