Solid state laser apparatus

   
   

Laser light emitted from an LD apparatus is concentrated and applied onto a laser light path region A of a slab-shaped YAG crystal 21 and the neighborhood thereof with the use of a concave lens and a pair of reflecting mirrors, a duct lens, or a plurality of cylindrical lenses, whereby a concentrated applied light intensity distribution in the side surface width direction (y-axis direction) of the slab-shaped YAG crystal is formed as a double-peak distribution having maximum values P.sub.1 and P.sub.2 at opposite end portions A.sub.1 and A.sub.2 of the laser light path region of the slab-shaped YAG crystal or in the neighborhoods thereof.

 
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