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Carrier-dependent nonlinear lens in a VECSEL gain medium

Carrier-dependent nonlinear lens in a VECSEL gain medium
Carrier-dependent nonlinear lens in a VECSEL gain medium
Vertical-external-cavity surface-emitting lasers (VECSELs) modelocked using saturable absorbers have become an established means of generating few hundred femtosecond optical pulses at Watt-level output powers and gigahertz repetition rates [1,2]. More recently there have been reports of self-modelocked VECSELs which do not use saturable absorbers, instead relying on nonlinear lensing in the laser gain sample as the necessary intensity dependent effect [3]. Design of these lasers is challenging as calculating the value of the nonlinear refractive index of a VECSEL gain sample is made complex by the fact that several physical effects contribute to it, including changes in carrier density, carrier thermalization, the Kerr effect and others. Given this complexity, calculation of accurate values for use in laser design is a difficult problem.
Optical Society of America
Quarterman, A.H.
1d59a842-c64f-4274-a808-17b7700fe20c
Shaw, E.A.
0bb156bd-9e0a-4bd9-88a2-0387c74c8404
Wilcox, K.G.
b7c8da76-3530-4cbf-aaec-ffa11c347230
Quarterman, A.H.
1d59a842-c64f-4274-a808-17b7700fe20c
Shaw, E.A.
0bb156bd-9e0a-4bd9-88a2-0387c74c8404
Wilcox, K.G.
b7c8da76-3530-4cbf-aaec-ffa11c347230

Quarterman, A.H., Shaw, E.A. and Wilcox, K.G. (2015) Carrier-dependent nonlinear lens in a VECSEL gain medium. In 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference. Optical Society of America..

Record type: Conference or Workshop Item (Paper)

Abstract

Vertical-external-cavity surface-emitting lasers (VECSELs) modelocked using saturable absorbers have become an established means of generating few hundred femtosecond optical pulses at Watt-level output powers and gigahertz repetition rates [1,2]. More recently there have been reports of self-modelocked VECSELs which do not use saturable absorbers, instead relying on nonlinear lensing in the laser gain sample as the necessary intensity dependent effect [3]. Design of these lasers is challenging as calculating the value of the nonlinear refractive index of a VECSEL gain sample is made complex by the fact that several physical effects contribute to it, including changes in carrier density, carrier thermalization, the Kerr effect and others. Given this complexity, calculation of accurate values for use in laser design is a difficult problem.

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More information

Published date: 2015
Additional Information: From the session: Vertical Cavity Lasers (VECSELs) II (CB_3)
Venue - Dates: 2015 European Conference on Lasers and Electro-Optics: CLEO®/Europe-EQEC 2015, Munich, Germany, 2015-06-21 - 2015-06-25

Identifiers

Local EPrints ID: 430437
URI: http://eprints.soton.ac.uk/id/eprint/430437
PURE UUID: d7ea2878-aea8-4d48-9ad8-b58a2d9ddbfc

Catalogue record

Date deposited: 01 May 2019 16:30
Last modified: 10 Jun 2019 16:30

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