From Event: SPIE OPTO, 2023
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.
© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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 (Presented at SPIE OPTO: February 02, 2023; Published: 17 March 2023); https://doi.org/10.1117/12.2655554.6321435021112.