Overview on laser diode pumped solid-state laser with direct pumping scheme

It is one of the most important questions to reduce the thermal effect and accumulation in the laser medium effectively, by pumping and lasing in the research of laser diode pump solid-state laser (DPSSL) at high power laser level. Compared with the conventional pumping scheme, direct pumping scheme at longer wavelength will not only reduce the heat by 30%-50%, but also improve the laser performances significantly. The development and status of direct pumping DPSSL based on the research of the Nd³⁺ doping laser are reviewed, the characteristics of the new pumping scheme and the progresses on Nd doping lasers are introduced. Finally, the new development in the future is prospected.