●Gas laser: The common is CO2, He-Ne laser,Ar + (Er).
●Solid-state laser: ruby laser, neodymium glass laser, Nd and YAG laser.
●Liquid laser: organic dye laser.
●Semiconductor laser: gallium arsenide semiconductor laser, diode.
●Solid-state laser: ruby laser, neodymium glass laser, Nd and YAG laser.
●Liquid laser: organic dye laser.
●Semiconductor laser: gallium arsenide semiconductor laser, diode.
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