Title :
Suppression of cladding mode coupling in Bragg grating using GeO 2-B2O3 codoped photosensitive cladding optical fibre
Author :
Oh, Kyunghwan ; Kim, Myung Su ; Seo, H.S. ; Paek, U.C. ; Kim, Myung Su ; Choi, Bo H.
Author_Institution :
Dept. of Inf. & Commun., Kwangju Inst. of Sci. & Technol., South Korea
fDate :
3/4/1999 12:00:00 AM
Abstract :
A new type of photosensitive optical fibre codoped with GeO2 -B2O3 in both the core and cladding has been fabricated for applications in Bragg grating. 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 grating imprinted without need for any hydrogen treatment
Keywords :
Bragg gratings; borosilicate glasses; germanate glasses; optical fibre cladding; optical fibre losses; wavelength division multiplexing; B2O3-GeO2-SiO2; WDM; cladding mode coupling suppression; fibre Bragg grating; fundamental core mode; photosensitive optical fibre; reflectivity;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19990168
