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Highly efficient KY1-x-yGdxLuy(WO4)2:Tm3+ channel waveguide lasers

Highly efficient KY1-x-yGdxLuy(WO4)2:Tm3+ channel waveguide lasers
Highly efficient KY1-x-yGdxLuy(WO4)2:Tm3+ channel waveguide lasers
High-quality crystalline KY(WO4)2:Yb3+ layers co-doped with large concentrations of optically inert Gd3+ and Lu3+ ions were grown by liquid phase epitaxy. Continuous-wave laser operation in a planar waveguide configuration was observed at 1025 nm. For 23% output coupling.. a maximum output power of 195 mW was obtained; a slope efficiency of 82.3% was derived, which to the best of our knowledge is the highest value yet reported for a planar waveguide laser to date. For 1.7% Output coupling, a laser threshold as low as 18 mW of absorbed pump power was achieved, which is largely due to the enhanced refractive index contrast of similar to 7.5 x 10-3 between the active layer and the undoped KY(WO4)2 substrate attained by the co-doping, leading to well-confined pump and laser modes.
van Dalfsen, K.
7d9cacd3-991c-4b17-a8eb-ad1b695a0af6
Aravazhi, S.
466dd0ea-aae1-4d35-b212-e598e0228cd1
Grivas, C.
7f564818-0ac0-4127-82a7-22e87ac35f1a
Garcia-Blanco, S.M.
3a9a848c-e4a6-4c50-a034-7b07defa53da
Pollnau, M.
1094856b-791a-4050-98d9-c07777d5f0f5
van Dalfsen, K.
7d9cacd3-991c-4b17-a8eb-ad1b695a0af6
Aravazhi, S.
466dd0ea-aae1-4d35-b212-e598e0228cd1
Grivas, C.
7f564818-0ac0-4127-82a7-22e87ac35f1a
Garcia-Blanco, S.M.
3a9a848c-e4a6-4c50-a034-7b07defa53da
Pollnau, M.
1094856b-791a-4050-98d9-c07777d5f0f5

van Dalfsen, K., Aravazhi, S., Grivas, C., Garcia-Blanco, S.M. and Pollnau, M. (2012) Highly efficient KY1-x-yGdxLuy(WO4)2:Tm3+ channel waveguide lasers. Conference on Lasers and Electro-Optics (CLEO)/Quantum Electronics and Laser Science (QELS) 2012, United States. 05 - 10 May 2012. (doi:10.1364/CLEO_SI.2012.CTu2D.5).

Record type: Conference or Workshop Item (Paper)

Abstract

High-quality crystalline KY(WO4)2:Yb3+ layers co-doped with large concentrations of optically inert Gd3+ and Lu3+ ions were grown by liquid phase epitaxy. Continuous-wave laser operation in a planar waveguide configuration was observed at 1025 nm. For 23% output coupling.. a maximum output power of 195 mW was obtained; a slope efficiency of 82.3% was derived, which to the best of our knowledge is the highest value yet reported for a planar waveguide laser to date. For 1.7% Output coupling, a laser threshold as low as 18 mW of absorbed pump power was achieved, which is largely due to the enhanced refractive index contrast of similar to 7.5 x 10-3 between the active layer and the undoped KY(WO4)2 substrate attained by the co-doping, leading to well-confined pump and laser modes.

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More information

Published date: 6 May 2012
Venue - Dates: Conference on Lasers and Electro-Optics (CLEO)/Quantum Electronics and Laser Science (QELS) 2012, United States, 2012-05-05 - 2012-05-10

Identifiers

Local EPrints ID: 443031
URI: http://eprints.soton.ac.uk/id/eprint/443031
PURE UUID: 9fce9a37-2b23-4783-becd-d9ae643fbbb1

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Date deposited: 06 Aug 2020 16:36
Last modified: 31 Aug 2020 16:30

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