1 Optical Fibre Technology Centre, Australian Photonics Cooperative Research Centre, University of Sydney, 206 National Innovation Centre, Australian Technology Park, Eveleigh, Sydney, NSW 1430, Australia.
The intrinsic 244-nm photosensitivity of boron-codoped germanosilicate optical fibers is enhanced by 355-nm hypersensitization. Hypersensitization through standard polymer coating is also demonstrated.