Abstract
A temperature distribution sensing system based on the reflection spectrum of a 70 mm apodized chirped fiber Bragg grating has been demonstrated. Reflection variations created by the Fabry-Perot effect due to the intra-grating wavelength shift are presented. By fitting a parametric transfer matrix model of the grating response to measured spectra, the temperature change, position and width of a localized temperature change are obtained. This system is particularly attractive of its simplicity, high spatial resolution and ability in measuring a non-monotonic distribution. Experiments to measure two localized heating regions along the grating indicate that the technique is promising for measuring more complex temperature profiles.
| Original language | English |
|---|---|
| Pages (from-to) | 494-499 |
| Number of pages | 6 |
| Journal | Optics Communications |
| Volume | 265 |
| Issue number | 2 |
| DOIs | |
| State | Published - 15 Sep 2006 |
| Externally published | Yes |
Keywords
- Bragg grating
- Fiber-optic sensors
- Temperature measurement
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