Patent ID: 6956883

Claim:
A semiconductor laser device comprising: a semiconductor laser element having a first edge surface and a second edge surface positioned opposite to the first edge surface, a main laser beam being emitted from the first edge surface, a monitoring laser beam being emitted from the second edge surface, and the monitoring laser beam varying in accordance with the main laser beam and being used for monitoring the state of the main laser beam; a chip-shaped light receiving element which receives the monitoring laser beam emitted from the second edge of the semiconductor laser element; a flat plate on which said semiconductor laser element and said light receiving element are mounted; and a package which is arranged on the flat plate and surrounds said light receiving element, said package having a light reflecting surface on at least a portion of the inner surface and preventing the monitoring laser beam from transmitting, and the light reflecting surface reflecting at least a part of the monitoring laser beam emitted from the second edge surface toward the light receiving element.