2010/07/19 by Galina Nemova, Raman Kashyap · 16 citations
Engineering · Physics and Astronomy · #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Crystal (programming language) #Doping #Excited state #Fiber laser #Ion #Laser #Laser cooling #Laser pumping #Materials science #Optical properties and cooling technologies in crystalline materials #Optics #Optoelectronics #Photon #Physics #Radiation #Solid State Laser Technologies #Superradiance #ZBLAN #physics.optics
paper · pdf · doi:10.1103/physreva.83.013404
published in Physical Review A 83(1) (American Physical Society) · 10 pages,6 figures
arxiv created 2010/07/19 · openalex publication_date 2011/01/19 · arxiv updated 2015/05/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present a theoretical scheme for laser cooling of rare-earth-doped solids with optical superradiance (SR), which is the coherent, sharply directed spontaneous emission of photons by a system of laser-excited rare-earth ions in the solid-state host (glass or crystal). We consider an Yb+-doped ZnF4-BaF2-LaF3-AlF3-NaF (ZBLAN) sample pumped at a wavelength 1015 nm, with a rectangular pulsed source with a power of \ensuremath∼433 W and a duration of 10 ns. The intensity of the SR is proportional to the square of the number of excited ions. This unique feature of SR permits an increase in the rate of the cooling process in comparison with the traditional laser cooling of the rare-earth-doped solids with anti-Stokes spontaneous incoherent radiation (fluorescence). This scheme overcomes the limitation of using only low phonon energy glasses for laser cooling.