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Upconversion lifetime quenching and ground-state bleaching in Nd3+:LiYF4

Upconversion lifetime quenching and ground-state bleaching in Nd3+:LiYF4
Upconversion lifetime quenching and ground-state bleaching in Nd3+:LiYF4
Since the Nd3+:LiYF4 system has some advantage over Nd3+:YAG and Nd3+:YVO4 for high-power scaling of diode-end-pumping, this system has been investigated under strong excitation. in this case using a Ti:sapphire pump. The interionic processes responsible for fluorescence saturation have been determined, due allowance being taken for the significant ground-state bleaching under these conditions.

Their temperature dependence, which is relevant to scaling consideration, has been investigated theoretically, and found to be rather small over a wide temperature range. By comparing the experimental data with finite-element rate-equation calculations, the influence of interionic upconversion is determined quantitatively, and a published value of the upconversion parameter is confirmed. The spatial dependence of ground-state bleaching and quenching of the fluorescence lifetime is calculated. Analytical expressions are derived, including the influence of interionic upconversion, for the dependence of ground-state bleaching, excitation density, and storage time on pump parameters and dopant concentration.
neodymium, lithium yttrium fluoride, interionic processes, upconversion, lifetime quenching, ground-state bleaching
0030-4018
203-211
Pollnau, M.
1094856b-791a-4050-98d9-c07777d5f0f5
Hardman, P.J.
2b18897a-de16-4a46-9e91-0b27f905a120
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2
Hanna, D.C.
3da5a5b4-71c2-4441-bb67-21f0d28a187d
Pollnau, M.
1094856b-791a-4050-98d9-c07777d5f0f5
Hardman, P.J.
2b18897a-de16-4a46-9e91-0b27f905a120
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2
Hanna, D.C.
3da5a5b4-71c2-4441-bb67-21f0d28a187d

Pollnau, M., Hardman, P.J., Clarkson, W.A. and Hanna, D.C. (1998) Upconversion lifetime quenching and ground-state bleaching in Nd3+:LiYF4. Optics Communications, 147 (1-3), 203-211. (doi:10.1016/S0030-4018(97)00524-5).

Record type: Article

Abstract

Since the Nd3+:LiYF4 system has some advantage over Nd3+:YAG and Nd3+:YVO4 for high-power scaling of diode-end-pumping, this system has been investigated under strong excitation. in this case using a Ti:sapphire pump. The interionic processes responsible for fluorescence saturation have been determined, due allowance being taken for the significant ground-state bleaching under these conditions.

Their temperature dependence, which is relevant to scaling consideration, has been investigated theoretically, and found to be rather small over a wide temperature range. By comparing the experimental data with finite-element rate-equation calculations, the influence of interionic upconversion is determined quantitatively, and a published value of the upconversion parameter is confirmed. The spatial dependence of ground-state bleaching and quenching of the fluorescence lifetime is calculated. Analytical expressions are derived, including the influence of interionic upconversion, for the dependence of ground-state bleaching, excitation density, and storage time on pump parameters and dopant concentration.

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More information

Published date: 1 February 1998
Keywords: neodymium, lithium yttrium fluoride, interionic processes, upconversion, lifetime quenching, ground-state bleaching

Identifiers

Local EPrints ID: 77942
URI: https://eprints.soton.ac.uk/id/eprint/77942
ISSN: 0030-4018
PURE UUID: 0e94b000-eb1d-42ed-b878-775ea9f4b99f

Catalogue record

Date deposited: 11 Mar 2010
Last modified: 17 Jul 2019 00:13

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