Patent ID: 7572070

Claim:
An optical device, comprising: an optical element chip on which an optical element is formed; an optical fiber assembly comprised of an optical fiber adapted to optically connect to the optical element, a first ferrule mounted at a tip of the optical fiber to connect and fix the optical element and the optical fiber, a second ferrule mounted on the optical fiber on an inner side from the first ferrule, and an enveloping pipe mounted on the second ferrule on the side of the first ferrule to envelop the optical fiber; a package containing and enveloping the optical element chip and having an opening for introducing the optical fiber assembly; and a support pipe mounted on an extension of the opening to support an introductory part of the optical fiber into the package together with the second ferrule constituting the optical fiber assembly to be introduced into the package and to hermetically seal the package, wherein the second ferrule is fixed inside the support pipe, one end thereof substantially protrudes at a tip part of the support pipe by a length required for the airtight fixing, and the enveloping pipe protrudes toward an inner part of the package.