Spectroscopic Investigation of Yb-doped Silica Glass for Solid-State Optical Refrigeration

Abstract

We have argued that a high-purity Yb-doped silica glass can potentially be cooled via anti-Stokes fluorescence optical refrigeration. This conclusion is reached by showing, using reasonable assumptions for the host material properties, that the non-radiative decay rate of Yb ions can be made substantially smaller than the radiative decay rate. Therefore, an internal quantum efficiency of near unity can be obtained. Using spectral measurements of the fluorescence emission from a Yb-doped silica optical fiber at different temperatures, we estimate the minimum achievable temperature in Yb-doped silica glass for different values of internal quantum efficiency.

References in corpus (2)

• Improvement of the Tm3+:3H4 level lifetime in silica optical fibres by lowering the local phonon energy
• Thermal Modeling, Heat Mitigation, and Radiative Cooling for Double-Clad Fiber Amplifiers

Cited by in corpus (6)

• Laser Cooling of Silica Glass
• Laser Cooling of a Yb Doped Silica Fiber by 18 Kelvin From Room Temperature
• Heat mitigation of a core/cladding Yb-doped fiber amplifier using anti-Stokes fluorescence cooling
• Temperature distribution inside a double-cladding optical fiber laser or amplifier
• Adaptive four-level modeling of laser cooling of solids
• Purcell-enhanced solid-state laser cooling