Demonstration of laser cooling in a novel all oxide GAYY silica glass.

Autor: Thomas J; Fabulas Laboratory, Department of Engineering Physics, Polytechnique Montreal, 2900 Blvd Edouard-Montpetit, Montreal, H3T 1J4, Canada. jyothis.thomas@polymtl.ca., Meyneng T; Centre d'Optique, Photonique et Laser, Université Laval, 2375 Rue de la Terrasse, Québec, QC, G1V 0A6, Canada., Tehranchi A; Fabulas Laboratory, Department of Electrical Engineering, Polytechnique Montreal, 2900 Blvd Edouard-Montpetit, Montreal, H3T 1J4, Canada., Gregoire N; Centre d'Optique, Photonique et Laser, Université Laval, 2375 Rue de la Terrasse, Québec, QC, G1V 0A6, Canada., Monet F; Fabulas Laboratory, Department of Engineering Physics, Polytechnique Montreal, 2900 Blvd Edouard-Montpetit, Montreal, H3T 1J4, Canada., Seletskiy D; femtoQ Laboratory, Department of Engineering Physics, Polytechnique Montreal, 2900 Blvd Edouard-Montpetit, Montreal, H3T 1J4, Canada., Messaddeq Y; Centre d'Optique, Photonique et Laser, Université Laval, 2375 Rue de la Terrasse, Québec, QC, G1V 0A6, Canada., Kashyap R; Fabulas Laboratory, Department of Engineering Physics, Polytechnique Montreal, 2900 Blvd Edouard-Montpetit, Montreal, H3T 1J4, Canada.; Fabulas Laboratory, Department of Electrical Engineering, Polytechnique Montreal, 2900 Blvd Edouard-Montpetit, Montreal, H3T 1J4, Canada.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Apr 03; Vol. 13 (1), pp. 5436. Date of Electronic Publication: 2023 Apr 03.
DOI: 10.1038/s41598-023-31912-1
Abstrakt: We demonstrate laser induced cooling in ytterbium doped silica (SiO 2 ) glass with alumina, yttria co-doping (GAYY-Aluminum: Yttrium: Ytterbium Glass) fabricated using the modified chemical vapour deposition (MCVD) technique. A maximum temperature reduction by - 0.9 K from room temperature (296 K) at atmospheric pressure was achieved using only 6.5 W of 1029 nm laser radiation. The developed fabrication process allows us to incorporate ytterbium at concentration of 4 × 10 26  ions/m 3 which is the highest value reported for laser cooling without clustering or lifetime shortening, as well as to reach a very low background absorptive loss of 10 dB/km. The numerical simulation of temperature change versus pump power well agrees with the observation and predicts, for the same conditions, a temperature reduction of 4 K from room temperature in a vacuum. This novel silica glass has a high potential for a vast number of applications in laser cooling such as radiation-balanced amplifiers and high-power lasers including fiber lasers.
(© 2023. The Author(s).)
Databáze: MEDLINE
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