Diode-pumped laser and spectroscopic properties of Yb,Ho:GGAG at 2 µm and 3 µm

Abstract

In this paper, spectroscopy and laser results obtained with new active medium Yb,Ho:GGAG (gadolinium-gallium-aluminum-garnet) emitting laser radiation at 2.09 µm and 2.94 µm are shown. The absorption, emission cross-section, and radiative decay time for several energy levels Yb 3+ ( 2 F 5/2 ), Ho 3+ ( 5 I 6 and 5 I 7 ) are presented. Using longitudinal diode pumping the laser action at 2 µm and 3 µm together with the wavelength tunability at several spectral bands 2063-2113 nm, 2860 nm, and 2912-2942 nm were reached.