Characteristics of Yb-doped silica fibers containing Y2O3 nanoparticles for optical refrigeration
Ytterbium doped optical fibers have recently attracted great attention as a novel material candidate for optical refrigeration. In this study we report on the structural and optical properties of purified ytterbium doped silica optical fibers with different rare earth ion concentration with Y2O3 nanoparticles for laser cooling applications. The temperature dependent absorption spectra, photoluminescence spectra, quantum efficiency and lifetime are presented. The background absorption coefficient as well as pump wavelength dependent temperature change of the fibers are measured using a fiber Bragg grating sensor.
Polytechnique Montréal (Canada)