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Properties of rare-earth doped gallium lanthanum sulphide glass

Hewak, D.W., Schweizer, T., Hector, J., Wang, J., Samson, B.N. and Brocklesby, W.S. (1996) Properties of rare-earth doped gallium lanthanum sulphide glass At International Conference on Luminescence (ICL'96), Czech Republic.

Record type: Conference or Workshop Item (Paper)


Gallium lanthanum sulphide (Ga:La:S) glass is now emerging as a promising material for active optical fibre device applications and in particular new fibre amplifiers and lasers. Recent success in fibre drawing, long wavelength spectroscopy and the demonstration of laser action [1,2,3] has opened up applications which extend in wavelength from the visible to over 5 microns. Moreover, Ga:La:S glass is an ideal host for the rare earths, with the dopant ions substituting directly for the lanthanum ion in the glass matrix. Its high refractive index of around 2.5, and its low maximum phonon energy of 425 cm shift the balance of radiative emission to non-radiative decay to among the most favourable known for glasses. In this paper we present the results of a spectroscopic evaluation of Ga:La:S glass. Results of measurements made on samples doped with praseodymium, dysprosium, erbium and neodymium are presented, identifying the key new applications these glasses have to offer. This includes a Judd-Ofelt analysis to reveal radiative transition probabilities, lifetime measurement and fluorescence measurements. Careful study of the absorption spectrum of undoped samples reveal the principle impurities which remain in the bulk glass and which must be removed before a practical fibre device can be realized. We conclude with recent results on optical fibre drawing trials thereby bringing together the spectroscopic results with the prospects for new fibre-based devices

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Published date: August 1996
Venue - Dates: International Conference on Luminescence (ICL'96), Czech Republic, 1996-08-01


Local EPrints ID: 76872
PURE UUID: 67173cc3-7ade-4cac-8702-f99c7b85c17f
ORCID for D.W. Hewak: ORCID iD
ORCID for W.S. Brocklesby: ORCID iD

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:37

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Author: D.W. Hewak ORCID iD
Author: T. Schweizer
Author: J. Hector
Author: J. Wang
Author: B.N. Samson
Author: W.S. Brocklesby ORCID iD

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