Optical Properties, and Continuous-Wave Laser Performance of a Novel Yb:Ca(Y,Lu)AlO4 Disordered Laser Crystal

Its physical and chemical properties and polarized spectra were investigated. The maximum absorption cross-sections were 7.98 × 10-20 cm2 (π-polarization) and 2.67 × 10-20 cm2 (σ-polarization), and the peak emission cross-sections were 0.72 × 10-20 cm2 (π) and 0.93 × 10-20 cm2 (σ).

A bandwidth of 94 nm in the σ-polarization emission spectra was observed. A continuous-wave laser experiment was performed, and a maximum output power of 3.6 W was achieved with a slope efficiency of 23.7%. The Yb:CYLA disordered laser crystal is proved to be a promising material for ultrafast lasers.