Patent ID: 7167494

Claim:
An optical transmission module comprising: a driver IC chip which drives a semiconductor laser device; a first insulation plate which is placed adjacent to the driver IC chip and has the semiconductor laser device mounted thereon; a coupling optical component which is place adjacent to the first insulation plate and is used to emit an optical signal from the semiconductor laser device into an optical fiber; and a second insulation plate which is placed adjacent to the first insulation plate and has a thin film inductor element and a thin film resistor element mounted thereon; wherein the driver IC chip, the first insulation plate, the coupling optical component, and the second insulation plate are contained in a package; and wherein the first insulation plate and the second insulation plate are connected by using a bonding wire or ribbon so that a bias current is supplied to the semiconductor laser device via the thin film inductor element and the thin film resistor element which are connected in parallel.