Demonstration of laser cooling in a novel all oxide GAYY silica glass.

ABSTRACT: We demonstrate laser induced cooling in ytterbium doped silica (SiO₂) glass with alumina, yttria co-doping (GAYY-Aluminum: Yttrium: Ytterbium Glass) fabricated using the modified chemical vapour deposition (MCVD) technique. A maximum temperature reduction by - 0.9 K from room temperature (296 K) at atmospheric pressure was achieved using only 6.5 W of 1029 nm laser radiation. The developed fabrication process allows us to incorporate ytterbium at concentration of 4 × 10²⁶ ions/m³ which is the highest value reported for laser cooling without clustering or lifetime shortening, as well as to reach a very low background absorptive loss of 10 dB/km. The numerical simulation of temperature change versus pump power well agrees with the observation and predicts, fo

SUBMITTER: Thomas J 

PROVIDER: S-EPMC10070423 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature