Power scaling strategy for resonant second-harmonic generation in the visible regime
Power scaling strategy for resonant second-harmonic generation in the visible regime
In this paper, we describe external resonant second harmonic generation (SHG) of a multi-axial mode near-infrared (near-IR) source for scaling power in the visible (green) spectral band. By distributing the power across multiple frequencies, we significantly increased the output power obtainable from an ytterbium-doped fibre amplifier before reaching the onset of Stimulated Brillouin Scattering (SBS). Using a near-IR laser with ∼9 longitudinal modes and an LBO crystal in a bow-tie cavity configuration, up to 15 W at a wavelength of 532 nm was achieved, with a conversion efficiency of 65% with respect to incident power. We discuss strategies for further up-scaling of output power, including increasing the number of axial modes and optimizing the amplifier configuration. Additionally, we highlight the advantages of our approach compared to previously reported high-power SHG systems, demonstrating its potential for future power scaling.
LBO, Multi-axial generation, SBS, Second harmonic generation
Medina, Manuel A.
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Alidousti, Sahar
aff2c910-a7b2-4211-ba2c-a1aa5df119ca
McEwan, Callum
8540983f-99c5-40e9-b2c0-88a6e6580911
Clarkson, W. Andrew
3b060f63-a303-4fa5-ad50-95f166df1ba2
1 April 2025
Medina, Manuel A.
8d6240a7-9fad-4078-8e2b-bb2a144e28f3
Alidousti, Sahar
aff2c910-a7b2-4211-ba2c-a1aa5df119ca
McEwan, Callum
8540983f-99c5-40e9-b2c0-88a6e6580911
Clarkson, W. Andrew
3b060f63-a303-4fa5-ad50-95f166df1ba2
Medina, Manuel A., Alidousti, Sahar, McEwan, Callum and Clarkson, W. Andrew
(2025)
Power scaling strategy for resonant second-harmonic generation in the visible regime.
Optics Communications, 583, [131776].
(doi:10.1016/j.optcom.2025.131776).
Abstract
In this paper, we describe external resonant second harmonic generation (SHG) of a multi-axial mode near-infrared (near-IR) source for scaling power in the visible (green) spectral band. By distributing the power across multiple frequencies, we significantly increased the output power obtainable from an ytterbium-doped fibre amplifier before reaching the onset of Stimulated Brillouin Scattering (SBS). Using a near-IR laser with ∼9 longitudinal modes and an LBO crystal in a bow-tie cavity configuration, up to 15 W at a wavelength of 532 nm was achieved, with a conversion efficiency of 65% with respect to incident power. We discuss strategies for further up-scaling of output power, including increasing the number of axial modes and optimizing the amplifier configuration. Additionally, we highlight the advantages of our approach compared to previously reported high-power SHG systems, demonstrating its potential for future power scaling.
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Accepted/In Press date: 18 March 2025
e-pub ahead of print date: 28 March 2025
Published date: 1 April 2025
Keywords:
LBO, Multi-axial generation, SBS, Second harmonic generation
Identifiers
Local EPrints ID: 500805
URI: http://eprints.soton.ac.uk/id/eprint/500805
ISSN: 0030-4018
PURE UUID: 9208f816-b98d-400e-a155-a18667abec37
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Date deposited: 13 May 2025 17:01
Last modified: 14 May 2025 02:09
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Contributors
Author:
Manuel A. Medina
Author:
Sahar Alidousti
Author:
Callum McEwan
Author:
W. Andrew Clarkson
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