Novel Wavelengths Watt-Level Pr^3+;:LiYF₄ Orange Lasers

We report the first demonstration on four new wave-lengths of 609 nm, 613 nm, 618 nm in both sigma- and pi-polarized direction based on continuous-wave Pr3+:LiYF4(Pr3+:YLF)lasers. The transitions mechanism combined dual upper energy levels of (3)P(1)and I-1(6) with Stark sub-levels of (3)H(6)and F-3(2) was designated. The CW lasers achieve output power greater than watt levels at room temperature, with 2.36 W at 609 nm, 1.85 Wat 618 nm, in the sigma-polarized direction and 1.93 W at 613 nm,1.40 W at 618 nm, in the pi-polarized direction.