Non-Competitive Cascade Lasing at 1.8 and 2.3 µm Using a Tm:CALGO Crystal
Abstract
Cascade lasing in a Tm:CALGO crystal at 1.8 µm ( 3 F 4 → 3 H 6 ) and 2.3 μm ( 3 H 4 → 3 H 5 ) is demonstrated with the originality of lacking a competition between the two laser channels, owing to dual-wavelength (direct and upconversion) pumping.