Patent ID: 7177331

Claim:
A laser diode module with a built-in high-frequency modulation IC, comprising: a) a heat sink with a plurality of legs attached to the rear side thereof; b) a mount disposed on the top of the heat sink; c) a submount supported against the mount; d) a laser diode chip disposed on the submount; and e) a photo diode chip mounted on the heat sink; whereby a circuit for producing high-frequency current and removing the reflected noise generated by the laser diode is integrated to be a high-frequency modulation IC and packaged within a metal cap, and wherein the high-frequency modulation IC creates an electric connection with connecting legs and the laser diode chip through wire boding, and the packaged laser diode module has four connection legs, two of which act as a positive and a negative terminal for supplying power to the built-in high-frequency modulation IC, and the other two are electrically connected to an external automatic power control circuit and act as the positive terminal of the laser diode chip and the photo diode chip, respectively.