Abstract
A new dynamic-strain interrogation system based on a fiber Bragg grating (FBG) triangular filter is proposed and experimentally demonstrated in this paper. Through a chirp in grating period and an apodization in index modulation, we fabricated a FBG triangular filter, and utilized this filter to demodulate the dynamic-strain signal of another wavelength-matched FBG sensor. By comparing with the results measured by a commercial strain-gauge, this system is proved to have a good performance in the measurement of dynamic strain. Since the system is compact and passive, it is able to be integrated as a portable demodulation module.
Original language | English |
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Pages (from-to) | 924-926 |
Number of pages | 3 |
Journal | Guangdianzi Jiguang/Journal of Optoelectronics Laser |
Volume | 18 |
Issue number | 8 |
Publication status | Published - 1 Aug 2007 |
Externally published | Yes |
Keywords
- Chirped FBG (CFBG)
- Dynamic strain measurement
- FBG sensor
- Fiber Bragg grating (FBG)
ASJC Scopus subject areas
- Electrical and Electronic Engineering