DPSS lasers(Diode-pumped solid-state lasers) are solid-state lasers made by pumping a solid gain medium, for example, a neodymium-doped YAG crystal, with a laser diode. DPSS lasers have advantages in compactness and efficiency over other types, and high power DPSS lasers have replaced ion lasers and flashlamp-pumped lasers in many scientific applications.