Laser beam oscillating apparatus

DETAILED DESCRIPTION The laser beam oscillating apparatus, which overcomes the above-discussed and numerous other disadvantages and deficiencies of the prior art, comprises a plurality of semiconductor laser beam oscillators each oscillating semiconductor laser beams of a different wavelength from each other, an optical waveguide formed on a substrate so that the semiconductor laser beams oscillated by each of the semiconductor laser beam oscillators are propagated therein and then emitted in the same direction from the output thereof, and an optical coupler disposed so as to introduce the semiconductor laser beams oscillated by each of said semiconductor laser beam oscillators into said optical waveguide, wherein each of said semiconductor laser beam oscillators are disposed at a predetermined position with respect to said optical coupler so that the semiconductor laser beams simultaneously oscillated by each of the semiconductor laser beam oscillators are simultaneously introduced into the optical waveguide from the optical coupler.
In a preferred embodiment, the substrate is provided with quasi phase matching parts.
In a preferred embodiment, the substrate is made of LiNbO.
sub.
3.
In another preferred embodiment, the substrate is made of sodium nitrate.
Thus, the invention described herein makes possible the objectives of (1) providing a laser beam oscillating apparatus of small size capable of oscillating laser beams of different wavelengths, and (2) providing a laser beam oscillating apparatus capable of easily controlling the direction of invisible laser beams.