Method of producing polished block type, single mode, evanscent wave directional couplers by means of mass production of the coupler halves

摘要

A process for the production of polished block single mode, evanescent wave directional optical couplers. The process comprises producing a plurality of discrete coupler halves, each coupler half having an optical fiber imbedded in a substrate. The coupler halves are then ground to remove a small portion of the cladding of the optical fiber to produce an oval shaped area of defined dimensions of the exposed fiber. The ground coupler halves are mounted in a first holder in a coplaner manner and further worked to a end point determined by an evanescent coupling measurement. A pair of coupler halves are secured together such that the optical fibers are in optical contact and in effective fusion with each other.