Title :
Thermal properties of fibre Bragg gratings inscribed point-by-point by infrared femtosecond laser
Author :
Martinez, A. ; Khrushchev, I.Y. ; Bennion, I.
Author_Institution :
Photonics Res. Group, Aston Univ., Birmingham, UK
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/spl deg/C is studied for the first time. Gratings inscribed by infrared femtosecond lasers were thermally stable at temperatures up to 900/spl deg/C, representing a significant improvement in comparison with the ´common´, UV-inscribed, gratings. Annealing at temperatures up to 700/spl deg/C increased grating reflectivity.
Keywords :
Bragg gratings; annealing; high-speed optical techniques; laser beam effects; optical fibres; reflectivity; thermal stability; 500 to 1050 degC; annealing; fibre Bragg gratings; grating reflectivity; infrared femtosecond laser; point by point method; thermal properties; thermal stability;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20057898
