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Infrared emission and ion-ion interactions in thulium and terbium doped gallium lanthanum sulphide glass

Infrared emission and ion-ion interactions in thulium and terbium doped gallium lanthanum sulphide glass
Infrared emission and ion-ion interactions in thulium and terbium doped gallium lanthanum sulphide glass
Infrared emission at 0.7, 0.8, 1.2, 1.5, 1.8, 2.3, 3.8, and 4.8µm is measured in thulium (Tm3+) and terbium (Tb3+) doped gallium lanthanum sulphide (GLS) glass. Emission cross sections are calculated from the absorption and emission spectra using Judd-Ofelt analysis, the Füchtbauer-Ladenburg equation, and the theory of McCumber. Fluorescence and lifetime measurements confirm energy transfer from Tm3+ to Tb3+ ions and reveal a number of new cross-relaxation/upconversion processes between Tm3+ ions involving the 3F(2,3) and 3H5 levels that can only be observed in low phonon energy materials. These processes indicate that the most efficient pump wavelength for the 1.2µm and 3.8µm transitions is 0.7µm. The Tm3+ fluorescence at 3.8µm coincides with an atmospheric transmission window and the Tb3+ fluorescence at 4.8µm overlaps with the fundamental absorption of carbon monoxide, making the glass a potential fibre laser source for remote sensing and gas sensing applications.
1094-4087
308-315
Schweizer, T.
1b183bb4-c89d-42bf-81e0-b2e2b9af2635
Samson, B.N.
0e9f1440-04ab-4aad-994f-554d24a3a419
Hector, J.R.
28b5aa8c-f863-4e22-b07a-6a28aed60ebc
Brocklesby, W.S.
c53ca2f6-db65-4e19-ad00-eebeb2e6de67
Hewak, D.W.
87c80070-c101-4f7a-914f-4cc3131e3db0
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d
Schweizer, T.
1b183bb4-c89d-42bf-81e0-b2e2b9af2635
Samson, B.N.
0e9f1440-04ab-4aad-994f-554d24a3a419
Hector, J.R.
28b5aa8c-f863-4e22-b07a-6a28aed60ebc
Brocklesby, W.S.
c53ca2f6-db65-4e19-ad00-eebeb2e6de67
Hewak, D.W.
87c80070-c101-4f7a-914f-4cc3131e3db0
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d

Schweizer, T., Samson, B.N., Hector, J.R., Brocklesby, W.S., Hewak, D.W. and Payne, D.N. (1999) Infrared emission and ion-ion interactions in thulium and terbium doped gallium lanthanum sulphide glass. Optics Express, 16 (2), 308-315. (doi:10.1364/JOSAB.16.000308).

Record type: Article

Abstract

Infrared emission at 0.7, 0.8, 1.2, 1.5, 1.8, 2.3, 3.8, and 4.8µm is measured in thulium (Tm3+) and terbium (Tb3+) doped gallium lanthanum sulphide (GLS) glass. Emission cross sections are calculated from the absorption and emission spectra using Judd-Ofelt analysis, the Füchtbauer-Ladenburg equation, and the theory of McCumber. Fluorescence and lifetime measurements confirm energy transfer from Tm3+ to Tb3+ ions and reveal a number of new cross-relaxation/upconversion processes between Tm3+ ions involving the 3F(2,3) and 3H5 levels that can only be observed in low phonon energy materials. These processes indicate that the most efficient pump wavelength for the 1.2µm and 3.8µm transitions is 0.7µm. The Tm3+ fluorescence at 3.8µm coincides with an atmospheric transmission window and the Tb3+ fluorescence at 4.8µm overlaps with the fundamental absorption of carbon monoxide, making the glass a potential fibre laser source for remote sensing and gas sensing applications.

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Published date: 1999

Identifiers

Local EPrints ID: 77837
URI: http://eprints.soton.ac.uk/id/eprint/77837
ISSN: 1094-4087
PURE UUID: f623141d-c5aa-4c5f-b8f3-ae9a3097c142
ORCID for W.S. Brocklesby: ORCID iD orcid.org/0000-0002-2123-6712
ORCID for D.W. Hewak: ORCID iD orcid.org/0000-0002-2093-5773

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Date deposited: 11 Mar 2010
Last modified: 03 Dec 2019 02:05

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