SEMICONDUCTOR LASER ELEMENT, SEMICONDUCTOR LASER MODULE AND PRODUCTION METHOD THEREFOR AND OPTICAL FIBER AMPLIFIER

摘要

A semiconductor laser element (2) comprising a first stripe (9) and a second stripe (10) which are formed at a distance, and emits a first laser (K1) beams and a second laser beams (K2) from end surfaces of the first stripe (9) and the second stripe (10); a first lens (4) to separate the distance between the first laser beams (K1) and the second laser beams (K2) emitted from the semiconductor laser element (2); a half-wave plate (6) which rotates the plane of polarization of the first laser beams (K1) by 90 degrees; a polarization beam combiner (7) which multiplexes the first laser beams (K1) and the second laser beams (K2) which are entered, and emits both the laser beams; and an optical fiber (8) which receives the laser beams emitted from the polarization beam combiner (7), and sends them to the outside are included.