A new type of photosensitive optical fibre codoped with Ge2O-B2O3 in both the core and cladding has been fabricated for applications in Bragg gratings. Coupling of the fundamental core mode into the cladding modes was suppressed with a narrow 3dB bandwidth in the Bragg grating. An increase in photosensitivity was also achieved by using high reflectivity Bragg gratings imprinted without the need for any hydrogen treatment.
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering