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DPSS laser

A laser diode pumped solid state laser (DPSS) produces laser light by pumping a resonator of a laser material, such as Nd:YAG or Nd:YLF, with light from laser diodes, exciting atoms or molecules within the laser material. A diode pumped solid state laser generally comprises a laser diode as the pump source and a laser cavity formed by a laser gain crystal and two reflective mirrors. The laser cavity may further comprise a nonlinear crystal for optical frequency conversion. The ends of the laser material may be polished and covered with a highly reflective coating, or external reflectors may be used, to form an oscillator cavity, reflecting light back and fourth through the laser material. Laser diodes emit a light beam with an elliptical shape. A laser diode array contains many individual laser diodes. Each diode emits its own laser beam from the emitting surface, which together form an elliptical light beam. The laser beam exits through one of the mirrors, or through a portion of one of the mirrors that is partially transparent. A DPSS laser has high efficiency and a large output-power in a relatively small size compared to a regular laser.

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