title: Direct inscription of Bragg gratings in coated fibers by an infrared femtosecond laser.
abstract: Inscription of fiber Bragg gratings through the coating of a nonphotosensitized standard telecommunication fiber is demonstrated for what is believed to be the first time. Highly reflective gratings were produced by direct point-by-point writing with an infrared femtosecond laser. The length of the gratings presented ranged from 5 to 26 mm. The technique does not require a special coating, as standard coatings are transparent to infrared radiation. Inscription through the coating improves the mechanical strength of the processed segment of fiber.
authors: Photonics Research Group, Electronic Engineering, Aston University, Birmingham, UK. martinea@aston.ac.uk
authors: Amos
authors: A
authors: Martinez
authors: Igor Y
authors: IY
authors: Khrushchev
authors: Ian
authors: I
authors: Bennion