Abstract
We propose and demonstrate using a single composite structure distributed Bragg reflector fiber laser (DBR-FL) for simultaneous sensing of refractive index (RI) and temperature. The FL structure consists of a pair of uniform fiber Bragg gratings (FBGs) forming the laser cavity. A variable cavity attenuator made by a blazed FBG (BFBG) is written inside the cavity, which varies the optical loss upon changes in the surrounding RI. Simultaneous sensing is realized from the fact that the output power only varies with the surrounding RI, whereas the lasing wavelength with the temperature. The sensitivity of RI measurement of the proposed FL improved by several times in comparison with the passive BFBG sensor.
| Original language | English |
|---|---|
| Article number | 5535123 |
| Pages (from-to) | 1464-1466 |
| Number of pages | 3 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 22 |
| Issue number | 19 |
| DOIs | |
| Publication status | Published - 22 Sept 2010 |
Keywords
- Composite structure distributed Bragg reflector fiber laser (DBR-FL)
- fiber laser sensor
- refractive index (RI)
- simultaneous two-parameter sensing
- temperature
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Atomic and Molecular Physics, and Optics
- Electronic, Optical and Magnetic Materials