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).

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Description/Abstract

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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1364/JOSAB.12.001747
ISSNs: 0740-3224 (print)
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Subjects:
ePrint ID: 78170
Date :
Date Event
1995Published
Date Deposited: 11 Mar 2010
Last Modified: 27 Apr 2017 01:32
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/78170

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