Patent ID: 7184453
Filing Date: 2007-02-27
Classification: H01L,H01S

Abstract:
1. A semiconductor laser device containing a laser driver comprising, a semiconductor laser element; a laser driver for driving the semiconductor laser element; a lead frame having a common mount surface on which the semiconductor laser element and the laser driver are mounted; one common package for accommodating therein the semiconductor laser element and the laser driver; a signal detection part for performing photoelectric conversion; and a hologram element provided upward of the semiconductor laser element and serving for transmitting laser light emitted by the semiconductor laser element toward a recording medium and then diffracting toward the signal detection part the laser light reflected by the recording medium; wherein the signal detection part is mounted on the common mount surface of the lead frame and accommodated in the common package, wherein the laser driver and the signal detection part are disposed on different sides of an optical axis of the semiconductor laser element, wherein the laser driver, the semiconductor laser element and the signal detection part are arranged in a direction in which the lead frame extends, wherein laser light emitted by the semiconductor laser element has in a sectional shape thereof a first breadth in a first direction and a second breadth in a second direction roughly orthogonal to the first direction in which the first breadth is narrower than the second breadth, and wherein the laser element and the signal detection part are arranged roughly along the first direction.