20.2W CW 2.118μm Ho:YAlO₃laser pumped by 1.915nm Tm-doped fiber laser

Abstract

We report on the continuous wave operation of a Ho:YAP laser pumped by an all-fiber Tm-doped fiber laser, the pump laser wavelength is 1.915μm and the output laser wavelength is 2.118μm. The all fiber Tm-doped fiber laser has 70W max output power with 200W pumped power, and the output laser wavelength is 1.915μm. And this laser is used as pump laser to a Ho:YAP laser system. 20.2W CW laser power is obtained from a 0.5 at % Ho 3+ -doped YAP crystal at 2118.4nm with slope efficiency of 72%.

High Power Ho:YAP Laser With 107 W of Output Power at 2117 nm

“…To date, several studies have been carried out to investigate the performance of Ho:YAP laser in-band pumped by Tm-doped solid-state lasers or all-fiber lasers, showing great potential of Ho:YAP as a gain material for high power and efficient ∼2.1 μm lasers [19]- [23]. So far, generation of over 20.2 W of CW output power at 2118 nm has been demonstrated from a Ho:YAP laser with a slope efficiency of 72% with respect to absorbed pump power [24].…”