Abstract
In this paper, we have characterised Brillouin frequency shift (BFS) in single mode silica fibre. In particular, BFS was characterised in conventional Brillouin Optical Time Domain Analysis (BOTDA) at operating wavelength of 1550 nm by a pump-probe technique. In addition, we also presented Brillouin gain and Brillouin loss mechanism in BOTDA sensing system. The simulation results shows, BFS have strong linear relationship with acoustic velocity and applied strain along the sensing fibre. A frequency shift of 60 MHz was obtained for each 0.1% strain (1000 μ-strain) on fibre. From the measurement results, it was evident that the each μ-strain on the fibre the frequency shift was found as 0.06 MHz. Therefore, BOTDA sensing system based on BFS is a promoting technique for structural health monitoring.
| Original language | English |
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| Title of host publication | Proceedings of the 2015 20th European Conference on Networks and Optical Communications - (NOC) |
| Place of Publication | Piscataway, NJ |
| Publisher | IEEE |
| Pages | 1-4 |
| Number of pages | 144 |
| ISBN (Print) | 9781479987993 |
| Publication status | Published - 28 Jul 2015 |
| Event | 20th IEEE European Conference on Network and Optical Communications (NOC) - London Duration: 28 Jul 2015 → … |
Conference
| Conference | 20th IEEE European Conference on Network and Optical Communications (NOC) |
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| Period | 28/07/15 → … |
Keywords
- Brillouin frequency shift
- Brillouin gain
- Brillouin optical time domain analysis