Fibre Bragg Grating Written in Pure Silica Photonic Crystal Fibres with Ultraviolet Femtosecond Laser Pulses

3 page(s

Femtosecond laser writing Bragg gratings in pure silica photonic crystal fibres

The fabrication of Bragg gratings in pure silica photonic crystal fibres using ultra-violet femtosecond laser radiation at 267 nm is reported. Gratings have been fabricated with a depth of up to 10 dB and an average index change of Δn> 4 x 10⁻⁴. Thermal annealing investigations indicate that our grating type is not type II.3 page(s