Saturated gain spectrum of VECSELs determined by transient measurement of lasing onset
Saturated gain spectrum of VECSELs determined by transient measurement of lasing onset
We describe time-resolved measurements of the evolution of the spectrum of radiation emitted by an optically-pumped continuous-wave InGaAs-GaAs quantum well laser, recorded as lasing builds up from noise to steady state. We extract a fitting parameter corresponding to the gain dispersion of the parabolic spectrum equal to ?79 ± 30 fs2 and ?36 ± 6 fs2 for a resonant and anti-resonant structure, respectively. Furthermore the recorded evolution of the spectrum allows for the calculation of an effective FWHM gain bandwidth for each structure, of 11 nm and 18 nm, respectively.
6919-6924
Head, C. Robin
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Wilcox, Keith G.
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Turnbull, Andrew P.
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Morris, Oliver J.
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Shaw, Edward A.
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Tropper, Anne C.
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24 March 2014
Head, C. Robin
f0cdbf7c-6da7-44e9-9788-262a11149f5e
Wilcox, Keith G.
f502ab15-607b-4e02-b0df-64122f85ed21
Turnbull, Andrew P.
2c57789f-3d54-450c-8078-0b6b04163ec1
Morris, Oliver J.
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Shaw, Edward A.
848b2af5-cc7c-4bd4-9f0f-e8ff86ac7cc6
Tropper, Anne C.
f3505426-e0d5-4e91-aed3-aecdb44b393c
Head, C. Robin, Wilcox, Keith G., Turnbull, Andrew P., Morris, Oliver J., Shaw, Edward A. and Tropper, Anne C.
(2014)
Saturated gain spectrum of VECSELs determined by transient measurement of lasing onset.
Optics Express, 22 (6), .
(doi:10.1364/OE.22.006919).
(PMID:24664040)
Abstract
We describe time-resolved measurements of the evolution of the spectrum of radiation emitted by an optically-pumped continuous-wave InGaAs-GaAs quantum well laser, recorded as lasing builds up from noise to steady state. We extract a fitting parameter corresponding to the gain dispersion of the parabolic spectrum equal to ?79 ± 30 fs2 and ?36 ± 6 fs2 for a resonant and anti-resonant structure, respectively. Furthermore the recorded evolution of the spectrum allows for the calculation of an effective FWHM gain bandwidth for each structure, of 11 nm and 18 nm, respectively.
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e-pub ahead of print date: 18 March 2014
Published date: 24 March 2014
Organisations:
Physics & Astronomy
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Local EPrints ID: 369149
URI: http://eprints.soton.ac.uk/id/eprint/369149
ISSN: 1094-4087
PURE UUID: 9f3d7e1f-2a0f-42dd-8fee-ce35d9aae492
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Date deposited: 18 Sep 2014 15:58
Last modified: 14 Mar 2024 17:58
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Contributors
Author:
C. Robin Head
Author:
Keith G. Wilcox
Author:
Andrew P. Turnbull
Author:
Oliver J. Morris
Author:
Edward A. Shaw
Author:
Anne C. Tropper
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