Abstract: A hermetically sealed injection laser package is made by first forming a sub-assembly of a monitoring photodiode (50) on a metal support member (53) and welding it to a heat sink (30) on which the laser (31) is mounted. The heat sink is secured inside the package housing (10) and then a further sub-assembly, comprising a plastics packaged optical fiber (60) hermetically sealed in a fiber support tube (61), is introduced through an aperture in one wall of the housing. Anchorage means (70) is laser beam welded to this tube and to the heat sink to secure the inner end in position for optimum optical coupling between the laser and the fiber.

Abstract: An injection laser mount assembly comprises a housing having a front surface extending in a plane parallel with a rear surface. The front surface has a central recess from which a pillar extends for carrying a laser. Optical coupling can be made with the laser by converting the mount assembly to an optical fiber termination.