Patent ID: 8559471

Claim:
A high-power diode end-pumped solid-state laser and its UV and deep-UV harmonic generations comprising: a. One or multiple fiber-coupled laser diodes as end pumps, wherein the pumping light of said laser diode can be split into two beams by a polarization beam splitter, the transmitted light from said beam splitter is horizontally polarized and pumps said laser crystal from one end, the reflected light from said beam splitter is vertically polarized and rotates its polarization by 90° after passing through a half wave plate and pumps said laser crystal from the other end; b. A laser crystal, said laser crystal can be Nd:YAG, Nd:YVO4, Gd:WO4, or Nd:YLF, which absorbs the light of said pumps and converts it into a fundamental laser light; c. One or multiple pairs of pump lens, said pump lens pair or pairs are arranged in a telescope way to image the light of said pumps on one end or both ends of said laser crystal; d. A fundamental laser cavity with two high-reflection end mirrors and multiple high-reflection folding mirrors, said end mirror means the reflected light reversely follows the path of the incident light after it is reflected by said end mirror, said folding mirror means the reflected light doesn't follow the path of the incident light after it is reflected by said folding mirror; e. A Q-switch in said fundamental laser cavity, said Q-switch is an electro-optic or acoustic-optical Q-switch; f. An intracavity SHG crystal converting said fundamental laser light into SHG laser light; g. a SHG laser cavity, said SHG cavity has two end mirrors having high reflection for said SHG laser light, said SHG laser cavity can share one end mirror with said fundamental laser cavity; h. One or multiple THG, FHG and 5HG harmonic crystals, said crystals convert said SHG laser light and said fundamental laser light into UV or deep UV laser lights; and i. One or multiple mirrors separating said UV or deep-UV laser light from said fundamental laser light and SHG laser light.