Direct laser written waveguide-Bragg gratings in bulk fused silica

Optical waveguides that incorporate Bragg gratings have been written in bulk fused silica by using the femtosecond laser direct-write method and without the need for lithography or ion-beam techniques. A single manufacturing process is used to create waveguide-Bragg grating reflectors for operation in the C band. (c) 2006 Optical Society of America.