Abstract
A dynamic distributed Brillouin optical fiber sensing based on dual-modulation is proposed, in which the scanning of the Brillouin gain spectrum (BGS) is implemented by the combination of a single-frequency modulation and a frequency-agility modulation. The frequency of the single-frequency modulation is a little less than the Brillouin frequency shift of the fiber (∼10.8 GHz for silica fiber), while the tuning range of the frequency-agility modulation is required to cover only several-hundred MHz for the scanning of BGS, which can significantly reduce the bandwidth requirement for the arbitrary waveform generator and ultimately reduce the cost of dynamic Brillouin sensors. With a 30-m fiber, a 11.8-Hz strain is measured. The spatial resolution and the sampling rate are 1 m and 200 Hz, respectively.
| Original language | English |
|---|---|
| Title of host publication | 25th International Conference on Optical Fiber Sensors |
| Editors | Libo Yuan, Youngjoo Chung, Wei Jin, Byoungho Lee, John Canning, Kentaro Nakamura |
| Publisher | SPIE |
| ISBN (Electronic) | 9781510610910 |
| DOIs | |
| State | Published - 2017 |
| Externally published | Yes |
| Event | 25th International Conference on Optical Fiber Sensors, OFS 2017 - Jeju, Korea, Republic of Duration: 24 Apr 2017 → 28 Apr 2017 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 10323 |
| ISSN (Print) | 0277-786X |
| ISSN (Electronic) | 1996-756X |
Conference
| Conference | 25th International Conference on Optical Fiber Sensors, OFS 2017 |
|---|---|
| Country/Territory | Korea, Republic of |
| City | Jeju |
| Period | 24/04/17 → 28/04/17 |
Bibliographical note
Publisher Copyright:© 2017 SPIE.
Keywords
- Brillouin optical fiber sensor
- Dynamic measurement
- Frequency-agility
- Strain measurement