Patent ID: 7376166

Claim:
A semiconductor laser apparatus comprising: a first semiconductor laser device having a first emission point emitting a light beam having a first wavelength in a direction substantially parallel to a first direction; a second semiconductor laser device having a second emission point emitting a light beam having a second wavelength different from a natural number times said first wavelength in the direction substantially parallel to the first direction; and a third semiconductor laser device having a third emission point emitting a light beam having a third wavelength substantially equal to a natural number times said first wavelength in the direction substantially parallel to the first direction, the distance between said first emission point and said third emission point being shorter than at least one of the distance between said first emission point and said second emission point and the distance between said second emission point and said third emission point on a first plane perpendicular to said first direction, and wherein said second and third semiconductor laser devices are joined to said first semiconductor laser device, said first semiconductor laser device comprises a nitride based semiconductor layer, said second semiconductor laser device comprises a gallium indium phosphide based semiconductor layer, and said third semiconductor laser device comprises a gallium arsenide based semiconductor layer.