Patent ID: 6367988
Filing Date: 2002-04-09
Classification: G02B

Abstract:
An optical transmission module composed of a carrier body, at least one semiconductor laser arranged on the carrier body, an optical fiber leading away from the carrier body for each semiconductor laser, and a respective hermetically tight, optical connection formed on the carrier body for each semiconductor laser between the semiconductor laser and an optical fiber, the improvement comprising the carrier body being composed of a housing that hermetically tightly surrounds a cavity in which each semiconductor laser is arranged; each hermetically tight, optical connection between a semiconductor laser and an optical fiber being composed of an optical connecting waveguide secured hermetically tight in the housing for producing an optical connection between the cavity and the outside environment of the housing, and optically connecting a light exit window of the semiconductor laser and an end face of the fiber to one another; and the housing comprises at least one electrical connecting line secured hermetically tight in the housing for producing an electrical connection between the cavity and the outside environment of the housing; the housing comprising a first housing section that comprises a blind-hole recess defining the cavity in which each semiconductor laser is arranged and in which all electrical connecting lines are secured heretically tight; and a second housing section in which all connecting waveguides are secured hermetically tight; the first housing section having an essentially planar surface region that contains an opening of the blind-hole recess; and the second housing section having an essentially planar surface region at which end faces of all connecting waveguides are located and exhibit essentially the same orientation as this surface region; and the surface region of the two housing sections being arranged lying opposite one another and being connected hermetically tightly to one another so that the surface region of the second housing section covers the opening of the blind-hole recess in the surface region of the first housing section to form the cavity, and the end face of each connecting waveguide lies opposite the light exit window of a respective semiconductor laser in the region of the opening to optically connect the laser to a fiber.