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Photosensitivity in tantalum doped silica optical fibres

Dong, L., Archambault, J.L., Taylor, E.R., Roe, M.P., Reekie, L. and Russell, P.St.J. (1995) Photosensitivity in tantalum doped silica optical fibres Journal of the Optical Society of America B, 12, (9), pp. 1747-1750. (doi:10.1364/JOSAB.12.001747).

Record type: Article


Photodarkening and photoinduced index changes are reported for the first time to our knowledge in tantalum-doped silica optical fibers exposed to KrF excimer laser emission at 248nm. The UV absorption of the tantalum-doped preform features the tail of a strong absorption band below 200nm. The 248nm-induced absorption in the UV also features the tail of a band below 200nm. Photodarkening at 900nm shows signs of saturation after several excimer pulses and some recovery after each pulse. Using an external holographic writing technique at 248nm, we also formed Bragg gratings at 1.55µm in these fibers. The grating growth saturated after several pulses and displayed a fast decay component when writing was performed with a higher pulse rate. The decay is well fitted by a stretched exponential with beta = 0.35.

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Published date: 1995
Organisations: Optoelectronics Research Centre


Local EPrints ID: 78170
ISSN: 0740-3224
PURE UUID: 53558a18-f4f7-40b3-8e6c-f979968be43e

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:26

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Author: L. Dong
Author: J.L. Archambault
Author: E.R. Taylor
Author: M.P. Roe
Author: L. Reekie
Author: P.St.J. Russell

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