Cascade lasing at ∼2 μm and ∼2.3 μm in a diode-pumped Tm:YVO<sub>4</sub> laser
Xiaoxu Yu, Zhognben Pan, Hongwei Chu, Fangyuan Zha, Han Pan, Lijuan Ma, Pavel Loiko, Patrice Camy, Dechun Li
Abstract
We report on the cascade continuous-wave operation of a diode-pumped Tm:YVO 4 laser on the 3 F 4 → 3 H 6 (at ∼2 μm) and 3 H 4 → 3 H 5 (at ∼2.3 μm) Tm 3+ transitions. Pumped with a fiber-coupled spatially multimode 794 nm AlGaAs laser diode, the 1.5 at.% Tm:YVO 4 laser yielded a maximum total output power of 6.09 W with a slope efficiency of 35.7% out of which the 3 H 4 → 3 H 5 laser emission corresponded to 1.15 W at 2291-2295 and 2362-2371 nm with a slope efficiency of 7.9% and a laser threshold of 6.25 W.
Topics & Concepts
Materials scienceLaserSlope efficiencyOpticsCascadeLasing thresholdDiodeLaser diodeThuliumFiber laserSemiconductor laser theoryOptoelectronicsAmplified spontaneous emissionPhysicsChemistryChromatographySolid State Laser TechnologiesLaser Design and ApplicationsPhotorefractive and Nonlinear Optics