Abstract
We demonstrate a high-spatial-resolution fast Brillouin optical time-domain analysis scheme based on frequency agility and differential double-pulse for distributed dynamic measurement. The frequency-agility probe wave is obtained from the second-order sideband of modulated light by using frequency-agility microwave signal from a wideband arbitrary waveform generator. The differential double-pulse technique is proposed to improve the spatial resolution while keeping the capability of dynamic measurement. In experiment, a spatial resolution of 20 cm is achieved by using a 52/50 ns differential double-pulse, and the distributed vibration measurement is demonstrated over a 50-m Panda fiber with a maximum vibration frequency of up to 50 Hz. With only five averages, the standard deviation of the strain accuracy is of 14 μV.
| Original language | English |
|---|---|
| Pages (from-to) | 1297-1301 |
| Number of pages | 5 |
| Journal | Russian Physics Journal |
| Volume | 56 |
| Issue number | 11 |
| DOIs | |
| State | Published - Mar 2014 |
| Externally published | Yes |
Bibliographical note
Funding Information:Yongkang Dong would like to acknowledge the financial support from the National Natural Science Foundation of China (grant 61205073).
Funding
Yongkang Dong would like to acknowledge the financial support from the National Natural Science Foundation of China (grant 61205073).
| Funders | Funder number |
|---|---|
| National Natural Science Foundation of China | 61205073 |
Keywords
- Brillouin optical time-domain analysis
- distributed measurement
- dynamic measurement