Solid-state laser cooling of Yb3+-doped KY3F10 to 145 K

Luca Koldeweyh, Stefan Püschel, Zoe Liestmann +1

We report laser cooling of Yb3+-doped KY3F10 (Yb:KY3F10) driven by a 100-W, 1020-nm pump source. Despite pumping at a non-optimal wavelength, high-quality KY3F10 crystals doped wit…