Abstract
The influence of the relative intensity noise, in particular the relaxation oscillation noise, of a distributed feedback (DFB) fibre laser on the performance of a polarimetric DFB fibre laser ultrasonic sensor is investigated theoretically and experimentally. A novel demodulation algorithm for the DFB fibre laser ultrasonic sensor is used to demodulate the polarization beat frequency and eliminate the effects of the intensity noise completely. The sensing system is demonstrated to demodulate time varying ultrasonic signals at 2.25 MHz and 10 MHz.
| Original language | English |
|---|---|
| Title of host publication | 26th International Conference on Optical Fiber Sensors |
| Place of Publication | Washington D.C. |
| Publisher | Optical Society of America |
| Number of pages | 4 |
| ISBN (Print) | 978-1-943580-50-7 |
| DOIs | |
| Publication status | Published - 24 Sept 2018 |
| Event | The 26th International Conference on Optical Fibre Sensors - SwissTech Convention Center, EPFL Campus, Lausanne, Switzerland Duration: 24 Sept 2018 → 28 Sept 2018 Conference number: 26 https://www.ofs26.org/site/OFS-26/page-143739.html |
Conference
| Conference | The 26th International Conference on Optical Fibre Sensors |
|---|---|
| Abbreviated title | OFS-26 |
| Country/Territory | Switzerland |
| City | Lausanne |
| Period | 24/09/18 → 28/09/18 |
| Internet address |
Keywords
- distributed feedback
- fibre laser
- intensity noise