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Semiconductor disk laser in bi-frequency operation by laser ablation micromachining of a laser mirror

Semiconductor disk laser in bi-frequency operation by laser ablation micromachining of a laser mirror
Semiconductor disk laser in bi-frequency operation by laser ablation micromachining of a laser mirror
We present bi-frequency continuous wave oscillation in a semiconductor disk laser through direct writing of loss-inducing patterns onto an intra-cavity high reflector mirror. The laser is a Vertical External Cavity Surface Emitting Laser which is optically pumped by up to 1.1 W of 808 nm light from a fibre coupled multi-mode diode laser, and oscillates on two Hermite-Gaussian spatial modes simultaneously, achieving wavelength separations between 0.2 nm and 5 nm around 995 nm. We use a Digital Micromirror Device (DMD) enabled laser ablation system to define spatially specific loss regions on a laser mirror by machining away the Bragg layers from the mirror surface. The ablated pattern is comprised of two orthogonal lines with the centermost region undamaged, and is positioned in the laser cavity so as to interact with the lasing mode, thereby promoting the simultaneous oscillation of the fundamental and a higher order spatial mode. We demonstrate bi-frequency oscillation over a range of mask gap sizes and pump powers.
1094-4087
22316-22316
Woods, Jonathan
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Heath, Daniel J
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Daykin, Jake
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Chen Sverre, Theo
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Keenlyside, Benjamin
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Mills, Ben
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Sagnes, Isabelle
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Beaudoine, Gregoire
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Blin, Stephane
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Garnache, Arnaud
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Tropper, Anne C.
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Apostolopoulos, Vasileios
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Woods, Jonathan
469cd675-1074-4b44-a0d4-b72a4915fa36
Heath, Daniel J
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Daykin, Jake
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Chen Sverre, Theo
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Keenlyside, Benjamin
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Mills, Ben
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Sagnes, Isabelle
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Beaudoine, Gregoire
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Blin, Stephane
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Garnache, Arnaud
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Tropper, Anne C.
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Apostolopoulos, Vasileios
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Woods, Jonathan, Heath, Daniel J, Daykin, Jake, Chen Sverre, Theo, Keenlyside, Benjamin, Mills, Ben, Sagnes, Isabelle, Beaudoine, Gregoire, Blin, Stephane, Garnache, Arnaud, Tropper, Anne C. and Apostolopoulos, Vasileios (2019) Semiconductor disk laser in bi-frequency operation by laser ablation micromachining of a laser mirror. Optics Express, 27 (16), 22316-22316. (doi:10.1364/OE.27.022316).

Record type: Article

Abstract

We present bi-frequency continuous wave oscillation in a semiconductor disk laser through direct writing of loss-inducing patterns onto an intra-cavity high reflector mirror. The laser is a Vertical External Cavity Surface Emitting Laser which is optically pumped by up to 1.1 W of 808 nm light from a fibre coupled multi-mode diode laser, and oscillates on two Hermite-Gaussian spatial modes simultaneously, achieving wavelength separations between 0.2 nm and 5 nm around 995 nm. We use a Digital Micromirror Device (DMD) enabled laser ablation system to define spatially specific loss regions on a laser mirror by machining away the Bragg layers from the mirror surface. The ablated pattern is comprised of two orthogonal lines with the centermost region undamaged, and is positioned in the laser cavity so as to interact with the lasing mode, thereby promoting the simultaneous oscillation of the fundamental and a higher order spatial mode. We demonstrate bi-frequency oscillation over a range of mask gap sizes and pump powers.

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Accepted/In Press date: 11 June 2019
e-pub ahead of print date: 23 July 2019
Published date: 2019

Identifiers

Local EPrints ID: 433226
URI: https://eprints.soton.ac.uk/id/eprint/433226
ISSN: 1094-4087
PURE UUID: 829066d1-152c-4087-8620-0d040c363077
ORCID for Ben Mills: ORCID iD orcid.org/0000-0002-1784-1012
ORCID for Vasileios Apostolopoulos: ORCID iD orcid.org/0000-0003-3733-2191

Catalogue record

Date deposited: 12 Aug 2019 16:30
Last modified: 22 Aug 2019 00:33

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Contributors

Author: Jonathan Woods
Author: Daniel J Heath
Author: Jake Daykin
Author: Theo Chen Sverre
Author: Benjamin Keenlyside
Author: Ben Mills ORCID iD
Author: Isabelle Sagnes
Author: Gregoire Beaudoine
Author: Stephane Blin
Author: Arnaud Garnache
Author: Anne C. Tropper

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