We report experimental findings for tailoring the temperature and strain coefficients of Type 1 and Type 1A 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 1 and Type 1A thermal coefficients and a significant improvement in the matrix condition number, which impacts the ability to recover accurate temperature and strain invariant data using the Type 1-1A dual grating sensor.
|Number of pages||4|
|Journal||Proceedings of SPIE - International Society for Optical Engineering|
|Issue number||PART II|
|Publication status||Published - 23 May 2005|
|Event||17th international conference on Optical Fibre Sensors - Bruges, Belgium|
Duration: 23 May 2005 → 27 May 2005
Bibliographical noteCopyright 2005 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 1A grating