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Suppression of cladding mode coupling in Bragg grating using GeO 2-B2O3 codoped photosensitive cladding optical fibre

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6 Author(s)
Oh, K. ; Dept. of Inf. & Commun., Kwangju Inst. of Sci. & Technol., South Korea ; Kim, M.S. ; Seo, H.S. ; Paek, U.C.
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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

Published in:

Electronics Letters  (Volume:35 ,  Issue: 5 )