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17 March 2023 Laser-induced cooling of rare earth doped oxide-only silica glass
Jyothis Thomas, Thomas Meyneng, Nicolas Grégoire, Frédéric Monet, Amirhossein Tehranchi, Denis Seletskiy, Younès Messaddeq, Raman Kashyap
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Proceedings Volume PC12437, Photonic Heat Engines: Science and Applications V; PC124370E (2023) https://doi.org/10.1117/12.2655554
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
We report optical cooling of a novel rare earth doped oxide-only silica glass fabricated using the modified chemical vapour deposition (MCVD) technique. An ytterbium concentration in silica glass of up to 6.55 x 10^26 ions/m^3 was achieved without compromising its optical properties. Samples were cooled to -0.8 K from room temperature (RT) at atmospheric pressure with pump power of 7 W at 1029 nm. We report experimental results on other RE dopants in oxide-only silica glass. Our approach opens possibilities not only for high efficiency laser cooling, but also in radiation balanced lasers, and compact high-power lasers and amplifiers.
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Jyothis Thomas, Thomas Meyneng, Nicolas Grégoire, Frédéric Monet, Amirhossein Tehranchi, Denis Seletskiy, Younès Messaddeq, and Raman Kashyap "Laser-induced cooling of rare earth doped oxide-only silica glass", Proc. SPIE PC12437, Photonic Heat Engines: Science and Applications V, PC124370E (17 March 2023); https://doi.org/10.1117/12.2655554
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KEYWORDS
Silica
Glasses
Oxides
Laser glasses
Phonons
Laser applications
Optical cooling
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