Title :
Bragg Gratings Made in Highly Nonlinear Bismuth Oxide Fibers With Ultrafast IR Radiation
Author :
Grobnic, Dan ; Walker, Robert B. ; Mihailov, Stephen J. ; Smelser, Christopher W. ; Lu, Ping
Author_Institution :
Commun. Res. Centre Canada, Ottawa, ON, Canada
Abstract :
High-quality Bragg gratings with refractive index modulations > 7 ?? 10-4 were induced in highly nonlinear bismuth oxide glass fibers using ultrafast infrared radiation and a phase mask. Grating reflectivities approaching 95% for a 6-mm-long grating were achieved. Annealing tests show good thermal stability of the grating structure below 220??C. The Bragg resonance shift with temperature is observed to be 3-4 times higher than similar gratings in silica fiber.
Keywords :
Bragg gratings; annealing; bismuth compounds; glass fibres; high-speed optical techniques; laser materials processing; masks; nonlinear optics; optical fibre fabrication; optical fibre testing; optical modulation; reflectivity; refractive index; thermal stability; Bi2O3; Bragg gratings; Bragg resonance shift; annealing tests; grating reflectivities; grating structure; nonlinear bismuth oxide glass fibers; phase mask; refractive index modulations; thermal stability; ultrafast infrared radiation; Bismuth glass; Bragg gratings; photosensitivity; ultrafast optics;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2009.2036739
