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Spectroscopic properties and energy transfer parameters of Tm3+ ions in gallium lanthanum sulfide glass

Spectroscopic properties and energy transfer parameters of Tm3+ ions in gallium lanthanum sulfide glass
Spectroscopic properties and energy transfer parameters of Tm3+ ions in gallium lanthanum sulfide glass
This work presents the spectroscopic characterization of Tm3+ doped gallium lanthanum sulfide (GaLaS) chalcogenide glass through absorption, fluorescence and lifetime measurements of excited 3H4 and 3F4 states, and a study of Tm3+:Tm3+ energy transfer. The cross relaxation 3H4,3H6 to 3F4,3F4 responsible for the pumping of level 3F4 and the laser transition at 1800 nm (3F4 to 3H6), as well as the energy migration 3H4,3H6 to 3H4,3H6 processes are studied in terms of the microscopic parameters of energy transfer Cda and Cdd obtained by the Kushida model of multipolar interactions and by a rate equation treatment of the dynamics of levels 3F4 and 3H4. From this treatment it was possible to simulate level 3F4 temporal evolution curves for different Tm3+ concentrations, leading to results that are in excellent agreement with experimental ones. All the samples studied in the work present positive optical gain coefficients for excitation densities higher than 12 kW cm-2 indicating the potentiality of GaLaS:Tm3+ glass as a mid-infrared laser active medium.
0953-8984
9495-9505
De Camargo, A.S.S.
26fb83ef-db35-4b9d-8d7f-218cc4d09ea3
De Oliveira, S.L.
d3985032-0e21-4c24-a86c-f1b3fe503812
De Sousa, D.F.
f12bf476-d3fd-4ca9-bcfd-14e7be26cc6b
Nunes, L.A.de Oliveira
6edba704-48dd-4b8a-8a19-dcfee971191b
Hewak, D.W.
87c80070-c101-4f7a-914f-4cc3131e3db0
De Camargo, A.S.S.
26fb83ef-db35-4b9d-8d7f-218cc4d09ea3
De Oliveira, S.L.
d3985032-0e21-4c24-a86c-f1b3fe503812
De Sousa, D.F.
f12bf476-d3fd-4ca9-bcfd-14e7be26cc6b
Nunes, L.A.de Oliveira
6edba704-48dd-4b8a-8a19-dcfee971191b
Hewak, D.W.
87c80070-c101-4f7a-914f-4cc3131e3db0

De Camargo, A.S.S., De Oliveira, S.L., De Sousa, D.F., Nunes, L.A.de Oliveira and Hewak, D.W. (2002) Spectroscopic properties and energy transfer parameters of Tm3+ ions in gallium lanthanum sulfide glass. Journal of Physics: Condensed Matter, 14 (41), 9495-9505. (doi:10.1088/0953-8984/14/41/307).

Record type: Article

Abstract

This work presents the spectroscopic characterization of Tm3+ doped gallium lanthanum sulfide (GaLaS) chalcogenide glass through absorption, fluorescence and lifetime measurements of excited 3H4 and 3F4 states, and a study of Tm3+:Tm3+ energy transfer. The cross relaxation 3H4,3H6 to 3F4,3F4 responsible for the pumping of level 3F4 and the laser transition at 1800 nm (3F4 to 3H6), as well as the energy migration 3H4,3H6 to 3H4,3H6 processes are studied in terms of the microscopic parameters of energy transfer Cda and Cdd obtained by the Kushida model of multipolar interactions and by a rate equation treatment of the dynamics of levels 3F4 and 3H4. From this treatment it was possible to simulate level 3F4 temporal evolution curves for different Tm3+ concentrations, leading to results that are in excellent agreement with experimental ones. All the samples studied in the work present positive optical gain coefficients for excitation densities higher than 12 kW cm-2 indicating the potentiality of GaLaS:Tm3+ glass as a mid-infrared laser active medium.

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More information

Published date: 2002
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 13743
URI: http://eprints.soton.ac.uk/id/eprint/13743
ISSN: 0953-8984
PURE UUID: 66f60227-f8ff-4c44-b514-7e736f95f4a7
ORCID for D.W. Hewak: ORCID iD orcid.org/0000-0002-2093-5773

Catalogue record

Date deposited: 08 Feb 2005
Last modified: 26 Nov 2019 02:02

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