Laser oscillation apparatus

A laser oscillation apparatus, comprising a laser beam emitting unit for emitting an excitation light, an optical resonance unit at least having a laser crystal and an output mirror, a plurality of optical fibers for guiding the laser beam from said laser beam emitting unit to said optical resonance unit, and a driving means for driving said laser beam emitting unit, wherein said laser beam emitting unit has a plurality of light emitting sources on a straight line, said plurality of optical fibers are arranged and held in such manner that end surfaces of said optical fibers face said plurality of light emitting sources respectively and said plurality of optical fibers makes up a fiber array unit, wherein said fiber array unit is adjustably held between a pair of wedge-shaped holders extending in a direction of an optical axis and each having inclined surfaces and a cross-section in triangular form, said fiber array unit being held so as to be brought into contact said inclined surfaces of said wedge-shaped holders facing each other, wherein optical axes of said fiber array unit and said light emitting sources are aligned by adjusting the positional relationship of said pair of wedge-shaped holders.