Patent ID: 8520707
Filing Date: 2013-08-27
Classification: G11B

Abstract:
1. An optical pickup device comprising: a first semiconductor laser element comprising a first emission point shifted from a center of the first semiconductor laser element, and a first side surface located closer to the first emission point than another side surface; a monolithic two-wavelength semiconductor laser element comprising a second side surface facing against and adjacent to the first side surface, and a second emission point and a third emission point with the second emission point being closer to the first side surface than the third emission point; and a supporting substrate on which the first semiconductor laser element and the monolithic two-wavelength semiconductor laser element are disposed in a junction down configuration; wherein the second side surface of the monolithic two-wavelength semiconductor laser element inclines in such a manner as to have a larger distance between the second side surface and the first side surface as moving away from the supporting substrate, a corner area of the second side surface located adjacent to the supporting substrate is defined by a cut-off from a resonator edge surface of the monolithic two-wavelength semiconductor laser element through another edge surface opposite from the resonator edge surface, and laser light irradiating from the second emission point has a same optical axis as an actual optical axis of the optical pick up device.