Patent ID: 7590357

Claim:
An optical module comprising: an optical element package accommodating an optical element and having a high-speed signal lead terminal, a power supply lead terminal, and a grounding lead terminal each connected to said optical element; a main printed wiring board on which an integrated circuit is mounted; an auxiliary printed wiring board on which a capacitive component is mounted, said auxiliary printed wiring board being arranged substantially perpendicular to said main printed wiring board; and a wiring component for connecting said main printed wiring board and said auxiliary printed wiring board; wherein: said auxiliary printed wiring board being arranged between said optical element package and said main printed wiring board in a direction of a plane of said main printed wiring board; a recess being formed in said auxiliary printed wiring board, said recess being formed upward from a bottom surface of said auxiliary printed wiring board, the bottom surface being substantially perpendicular to a plane of said auxiliary printed wiring board, the capacitive component being mounted on the plane; said power supply lead terminal and said grounding lead terminal being connected to said auxiliary printed wiring board; said high-speed signal lead terminal being directly connected to said main printed wiring board through said recess.