These lasers are called “solid-state” because the light is generated within a solid material, rather than a gas or liquid. DPSS lasers are typically more efficient and compact than other types of lasers, making them useful in a variety of applications. One common application for DPSS lasers is laser displays.
Diode lasers have a very short cavity, and thus have a lot of modes. Because the gain curve is quite wide, the spectrum is also wide. A DPSS has a much and much larger cavity. The linewidth is much smaller and because the gain curve is smaller the spectrum is much better.
Diode-pumped solid-state (DPSS) nanosecond (ns) lasers are based on the rare-earth ion-doped transparent gain media using laser diodes as the pumping source. Its application in PA imaging has been extensively increased because of its features and affordability.
