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Numerical simulation of optical Stark effect saturable absorbers in mode-locked femtosecond VECSELs using a modified two-level atom model

Numerical simulation of optical Stark effect saturable absorbers in mode-locked femtosecond VECSELs using a modified two-level atom model
Numerical simulation of optical Stark effect saturable absorbers in mode-locked femtosecond VECSELs using a modified two-level atom model
The interaction of an optical pulse with a quantum well saturable absorber is simulated using a semi-classical two-level-atom model which has been modified to approximate spectral hole burning in the carrier distribution. Saturable absorption behaviour is examined in the limit where pulse duration approaches the carrier-carrier scattering time. For long pulses bleaching dominates the absorber response but as the pulse duration approaches the carrier-carrier scattering timescale an additional pulse shaping mechanism becomes active, allowing the absorber to continue to shorten pulses beyond the limit set by bleaching. Examination of the spectral and temporal absorption profiles suggests that intense pulses experience additional pulse shortening from the optical Stark effect.
1094-4087
26783-26795
Quarterman, A.H.
337f5bd1-5420-45fb-a7e1-f3955c1bfe62
Carswell, S.
615054b2-cd35-4a60-a9b6-e4017e5caddd
Daniell, G.J.
82c59eea-5002-4889-8823-2c6e5b3288d3
Mihoubi, Z.
cd6da620-8894-41a0-b5b3-9a45d5061349
Wilcox, K.G.
b7c8da76-3530-4cbf-aaec-ffa11c347230
Chung, A.L.
7112496f-1459-4e30-938a-f36ea2b135b6
Apostolopoulos, V.
8a898740-4c71-4040-a577-9b9d70530b4d
Tropper, A.C.
f3505426-e0d5-4e91-aed3-aecdb44b393c
Quarterman, A.H.
337f5bd1-5420-45fb-a7e1-f3955c1bfe62
Carswell, S.
615054b2-cd35-4a60-a9b6-e4017e5caddd
Daniell, G.J.
82c59eea-5002-4889-8823-2c6e5b3288d3
Mihoubi, Z.
cd6da620-8894-41a0-b5b3-9a45d5061349
Wilcox, K.G.
b7c8da76-3530-4cbf-aaec-ffa11c347230
Chung, A.L.
7112496f-1459-4e30-938a-f36ea2b135b6
Apostolopoulos, V.
8a898740-4c71-4040-a577-9b9d70530b4d
Tropper, A.C.
f3505426-e0d5-4e91-aed3-aecdb44b393c

Quarterman, A.H., Carswell, S., Daniell, G.J., Mihoubi, Z., Wilcox, K.G., Chung, A.L., Apostolopoulos, V. and Tropper, A.C. (2011) Numerical simulation of optical Stark effect saturable absorbers in mode-locked femtosecond VECSELs using a modified two-level atom model. Optics Express, 19 (27), 26783-26795. (doi:10.1364/OE.19.026783). (PMID:22274261)

Record type: Article

Abstract

The interaction of an optical pulse with a quantum well saturable absorber is simulated using a semi-classical two-level-atom model which has been modified to approximate spectral hole burning in the carrier distribution. Saturable absorption behaviour is examined in the limit where pulse duration approaches the carrier-carrier scattering time. For long pulses bleaching dominates the absorber response but as the pulse duration approaches the carrier-carrier scattering timescale an additional pulse shaping mechanism becomes active, allowing the absorber to continue to shorten pulses beyond the limit set by bleaching. Examination of the spectral and temporal absorption profiles suggests that intense pulses experience additional pulse shortening from the optical Stark effect.

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More information

Published date: December 2011
Organisations: Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 339032
URI: http://eprints.soton.ac.uk/id/eprint/339032
ISSN: 1094-4087
PURE UUID: 4927b912-19af-42ea-9532-af5c5d54221e
ORCID for V. Apostolopoulos: ORCID iD orcid.org/0000-0003-3733-2191

Catalogue record

Date deposited: 23 May 2012 12:24
Last modified: 09 Nov 2021 03:17

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Contributors

Author: A.H. Quarterman
Author: S. Carswell
Author: G.J. Daniell
Author: Z. Mihoubi
Author: K.G. Wilcox
Author: A.L. Chung
Author: A.C. Tropper

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