Open AccessImplementation of Laser-Induced Anti-Stokes Fluorescence Power Cooling of Ytterbium-Doped Silica Glass
Author(s) -
Mostafa Peysokhan,
Saeid Rostami,
Esmaeil Mobini,
Alexander R. Albrecht,
Stefan Kühn,
Sigrun Hein,
Christian Hupel,
Johannes Nold,
Nicoletta Haarlammert,
Sabu Thomas,
Ramona Eberhardt,
Angel Flores,
Andreas Tünnermann,
Mansoor SheikBahae,
Arash Mafi
Publication year - 2021
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.1c00116
Subject(s) - materials science , ytterbium , laser , laser cooling , doping , optics , fluorescence , optoelectronics , wavelength , fiber laser , laser power scaling , solid state laser , physics
Laser cooling of a solid is achieved when a coherent laser illuminates the material, and the heat is extracted by annihilation of phonons resulting in anti-Stokes fluorescence. Over the past year, net solid-state laser cooling was successfully demonstrated for the first time in Yb-doped silica glass in both bulk samples and fibers. Here, we report more than 6 K of cooling below the ambient temperature, which is the lowest temperature achieved in solid-state laser cooling of silica glass to date to the best of our knowledge. We present details on the experiment performed using a 20 W laser operating at a 1035 nm wavelength and temperature measurements using both a thermal camera and the differential luminescence thermometry technique.