SEMICONDUCTOR LASER, BIO-IMAGING SYSTEM, MICROSCOPE, OPTICAL DISK DEVICE, OPTICAL PICKUP, PROCESSING MACHINE, AND ENDOSCOPE

摘要

PROBLEM TO BE SOLVED: To provide a semiconductor laser capable of easily obtaining a compact, high-power ultrashort pulsed light source at low cost. SOLUTION: A semiconductor laser comprises one laser chip 51 that has at least one laser stripe 52 between a first end face 51a and a second end face 51b opposing to each other. The laser chip 51 has a mode-locked laser section 54 on the first end face 51a side, and a semiconductor light amplifier section 55, which amplifies light emitted by the mode-locked laser section 54, on the second end face 51b side. The angle which the normal to the first end face 51a forms with the laser stripe 52 in the mode-locked laser section 54 is not less than 0°and not more then 1°; and the angle which the normal forms with the laser stripe 52 in the semiconductor light amplifier section 55 is more than 1°and less than 90°. COPYRIGHT: (C)2009,JPO&INPIT