Upconversion rate in Nd-doped Ta2O5 waveguides and influence on the cw laser performance
Upconversion rate in Nd-doped Ta2O5 waveguides and influence on the cw laser performance
The non-linear upconversion processes in Nd-doped Ta2O5 waveguides have been investigated to determine the depopulation rate of the 4F3/2 laser level due to energy transfer upconversion (ETU). A rate-equation analysis has been used to obtain analytical expressions of the population and average lifetime of the 4F3/2 level under modulated cw excitation. The analysis of lifetime measurements as a function of excitation power yielded to an ETU rate of about 22 800 s-1. Equations for the four level cw laser performance have been obtained using a rate-equation approximation that includes ETU processes. The effect of upconversion on the laser performance has been estimated using the parameters obtained for the Nd-doped Ta2O5 waveguide lasers.
135-140
Lahoz, F.
9852a047-43a2-4649-a3a0-eb0322d565b3
Hassan, M.A.
a63a0bd2-8f6a-4d76-8143-08a1cb83d110
26 July 2006
Lahoz, F.
9852a047-43a2-4649-a3a0-eb0322d565b3
Hassan, M.A.
a63a0bd2-8f6a-4d76-8143-08a1cb83d110
Lahoz, F. and Hassan, M.A.
(2006)
Upconversion rate in Nd-doped Ta2O5 waveguides and influence on the cw laser performance.
Chemical Physics Letters, 426 (1-3), .
(doi:10.1016/j.cplett.2006.05.061).
Abstract
The non-linear upconversion processes in Nd-doped Ta2O5 waveguides have been investigated to determine the depopulation rate of the 4F3/2 laser level due to energy transfer upconversion (ETU). A rate-equation analysis has been used to obtain analytical expressions of the population and average lifetime of the 4F3/2 level under modulated cw excitation. The analysis of lifetime measurements as a function of excitation power yielded to an ETU rate of about 22 800 s-1. Equations for the four level cw laser performance have been obtained using a rate-equation approximation that includes ETU processes. The effect of upconversion on the laser performance has been estimated using the parameters obtained for the Nd-doped Ta2O5 waveguide lasers.
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Published date: 26 July 2006
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Local EPrints ID: 46904
URI: http://eprints.soton.ac.uk/id/eprint/46904
ISSN: 0009-2614
PURE UUID: 8f1560ac-e194-4809-82e8-ac29b055a540
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Date deposited: 27 Jul 2007
Last modified: 15 Mar 2024 09:28
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Author:
F. Lahoz
Author:
M.A. Hassan
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