Patent ID: 8121168
Filing Date: 2012-02-21
Classification: H01S

Abstract:
1. A multibeam laser diode comprising: a laser diode device including a laser diode device body having a surface and a plurality of protruding streaks projecting from the surface as an integral construction with the laser diode device body and extending longitudinally therealong in a parallel manner, the plurality of protruding streaks disposed adjacent to yet disposed part from one another; a plurality of contact electrodes, respective ones of the plurality of contact electrodes contacting and covering respective ones of the plurality of protruding streaks in their entirety as viewed in cross-section; a plurality of pad electrodes disposed on the surface of the laser diode device body with at least one pair of disposed-apart pad electrodes extending longitudinally along the surface parallel to the plurality of protruding streaks, the plurality of protruding streaks disposed between the at least one pair of disposed-apart pad electrodes; a pair of wiring electrodes, a respective one of the pair of wiring electrodes extending laterally relative to the pair of protruding streaks such that a respective one of the pair of wiring electrodes electrically connects respective adjacent ones of the contact electrodes and the pad electrodes; a continuously-extending first insulating film contacting and covering the plurality of contact electrodes and the surface of the laser diode device body on both lateral sides of each one of the plurality of protruding streaks as viewed in cross-section; and a heat conduction layer configured of a metal, the heat conduction layer contacting and covering at least a significant portion of the first insulating film as viewed in cross section, the heat conduction layer continuously extending laterally as viewed in cross-section at least where the first insulating film contacts and covers the plurality of contact electrodes and the surface of the laser diode device body between adjacent ones of the plurality of contact electrodes.