Thermal properties of fibre Bragg gratings inscribed point-by-point by infrared femtosecond laser
- 1 January 2005
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 41 (4), 176-178
- https://doi.org/10.1049/el:20057898
Abstract
Direct, point-by-point inscription of fibre Bragg gratings by an infrared femtosecond laser has been reported recently. Response of these gratings to annealing at temperatures in the range 500 to 1050°C is studied for the first time. Gratings inscribed by infrared femtosecond lasers were thermally stable at temperatures up to 900°C, representing a significant improvement in comparison with the ‘common’, UV-inscribed, gratings. Annealing at temperatures up to 700°C increased grating reflectivity.Keywords
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