Title :
Bragg Gratings Made With a Femtosecond Laser in Heavily Doped Er–Yb Phosphate Glass Fiber
Author :
Grobnic, Dan ; Mihailov, Stephen J. ; Walker, Robert B. ; Smelser, Christopher W. ; Lafond, Christophe ; Croteau, André
Author_Institution :
Commun. Res. Centre, Ottawa, Ont.
fDate :
6/15/2007 12:00:00 AM
Abstract :
Bragg gratings made in heavily doped phosphate glass fibers using ultrafast infrared radiation and a phase mask are reported. Refractive indexes >1.5times10-3 were induced in Er-Yb-doped phosphate fiber in a few seconds of exposure corresponding to reflectivity above 99.99% for a 6-mm-long grating. Annealing test up to 400 degC shows good thermal stability of the grating structure
Keywords :
Bragg gratings; annealing; erbium; glass fibres; high-speed optical techniques; laser materials processing; optical fibre fabrication; optical fibre testing; phosphate glasses; reflectivity; refractive index; thermal stability; ytterbium; 400 degC; 6 mm; Bragg gratings; P2O5:Er,Yb; annealing test; femtosecond laser; heavily doped Er-Yb phosphate glass fiber; phase mask; reflectivity; refractive index; thermal stability; ultrafast infrared radiation; Bragg gratings; Erbium-doped fiber lasers; Fiber gratings; Fiber lasers; Glass; Optical fiber polarization; Optical fibers; Optical waveguides; Silicon compounds; Ultrafast optics; Bragg gratings; fiber lasers; phosphate glass; ultrafast optics;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.898816
