Patent ID: 7457333

Claim:
A light-transmitting module, comprising: a stack of a metallic block, an insulating heat sink mounted on said metallic block and an electrically conductive layer formed on said insulating heat sink, said stack forming a parallel-plate capacitor with capacitance; a laser diode having an anode and a cathode, said laser diode being mounted on said conductive layer such that said anode faces and is in contact with said conductive layer, said laser diode being driven by a driver signal provided by said cathode and being biased in said anode through said conductive layer and a bonding wire with inductance, said bonding wire being connected with said conductive layer; and a driver for providing said driver signal to said cathode of said laser diode, said driver being directly mounted on a metallic block, wherein a said capacitance of said parallel-plate capacitor is at least 50 pF such that a critical frequency formed by said parallel-plate capacitor and said inductance of said bonding wire exceeds 10 GHz.