The review of history and progress on radiation-balanced (athermal) lasers is presented with
a special focus on rare earth (RE)-doped lasers. In the majority of lasers, heat generated …

This review focuses on optical refrigeration with the anti-Stokes fluorescence of rare-earth
(RE)-doped low-phonon micro-and nanocrystals. Contrary to bulk samples, where the …

Microlaser designs based on the coupling of whispering gallery modes (WGMs) with the
upconversion processes which take place within lanthanide-doped nanoparticles (UCNPs) …

Over the past two and a half decades, advancements in the field of laser cooling of solids
have provided a way to reach cryogenic temperatures in rare-earth-doped glasses and …