Suppression of cladding mode coupling in Bragg grating using Ge2O-B2O3 codoped photosensitive cladding optical fibre
- 1 January 1999
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 35 (5), 423-424
- https://doi.org/10.1049/el:19990168
Abstract
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 3 dB 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.Keywords
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