To provide a semiconductor laser device that is capable of outputting high power
laser light and is suitable for optical recording, optical communication, welding,
and the like, and a multiple wavelength laser light emitting apparatus employing
the semiconductor laser device. The semiconductor laser device includes an optical
element that at least partially reflects a laser beam emitted from an end face
of a laser light oscillator in a semiconductor laser array element so that the
laser beam is incident on another laser light oscillator. Due to this, even when
laser light oscillators are disposed with such a pitch that does not pose problems
in manufacturing, a laser beam emitted from an end face of one laser light oscillator
and a laser beam emitted from an end face of another laser light oscillator are
phase-locked. By condensing these laser beams, the semiconductor laser device can
output higher power laser light than conventional.
