Abstract
A novel high-frequency fiber Bragg grating (FBG) sensing interrogation system by using fiber Sagnac-loop-based microwave photonic filtering is proposed and experimentally demonstrated. By adopting the microwave photonic filtering, the wavelength shift of sensing FBG can be converted into amplitude variation of the modulated electronic radio-frequency (RF) signal. In the experiment, the strain applied onto the sensing FBG has been demodulated by measuring the intensity of the recovered RF signal, and by modulating the RF signal with different frequencies, different interrogation sensitivities can be achieved.
| Original language | English |
|---|---|
| Pages (from-to) | 519-521 |
| Number of pages | 3 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 21 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 15 Apr 2009 |
Bibliographical note
©2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.Keywords
- chirped fiber Bragg grating
- CFBG
- microwave photonics
- Sagnac loop
- strain sensor