Patent ID: 8104977

Claim:
An optical transceiver installed on and communicated with a host system by being inserted in a cage prepared in said host system, comprising: a bi-directional optical sub-assembly with a single package that installs a light-emitting device and a light-receiving device within said single package; a printed circuit board configured to mount an IC that is electrically connected with said bi-directional optical sub-assembly; a base made of a metal sheet for mounting said printed circuit board and said bi-directional optical sub-assembly thereon; a sub-base made of a metal sheet for sandwiching said printed circuit board with said base, said sub-base being thermally in contact with said IC on said printed circuit board; and a cover for enclosing said bi-directional optical sub-assembly, said printed circuit board, said base and said sub-base therein; and a heat conductor in thermal contact with said bi-directional optical module, said base and said cover but independent of said sub-base for conducting heat generated in said bi-directional optical sub-assembly to said cover and said base.