Coupling device having a structured reflective surface for coupling input/output of an optical fiber

A process of making a coupling device for physically and optically coupling an optical fiber for routing optical signals, comprising:

• forming a base having a structured reflective surface and an optical fiber retention structure, such that an end face of the optical fiber is located at a predetermined distance from the structured reflective surface along the axis of the optical fiber, wherein the optical fiber retention structure accurately aligns the optical fiber with respect to the structured reflective surface along an optical path, so that output light from the optical fiber can be reflected by the structured reflective surface to outside the coupling device or input light from outside the coupling device incident at the structure reflective surface can be reflected towards the optical fiber, wherein the optical fiber retention structure comprises a groove provided on the base, wherein the groove is aligned with respect to the structured reflective surface, characterized in that the base is made of a malleable metal material, and the structured reflective surface and the optical fiber retention structure comprising the groove are formed by stamping the malleable metal material to integrally define the structured reflective surface and the optical fiber retention structure on the base.