We report experimental findings for tailoring the temperature and strain coefficients of Type I and Type IA fibre Bragg gratings by influencing the photosensitivity presensitisation of the host optical fibre. It is shown that by controlling the level of hydrogen saturation, via hot and cold hydrogenation, it is possible to produce gratings with lower thermal coefficients. Furthermore, there is a larger difference between the Type I and Type IA thermal coefficients and a significant improvement in the matrix condition number, which impacts the ability to recover accurate temperature and strain data using the Type1-1A dual grating sensor.
|Journal||Proceedings of SPIE - International Society for Optical Engineering|
|Publication status||Published - 9 Aug 2006|
|Event||Optical Sensing II - Strasbourg, United Kingdom|
Duration: 3 Apr 2006 → 6 Apr 2006
Bibliographical noteCopyright 2006 SPIE. One print or electronic copy may be made for personal use only. Systematic reproduction, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
- Fibre Bragg gratings
- Optical fibre sensors
- Temperature and strain sensors
- Type IA grating