METHOD FOR PRODUCING A RIDGE OPTICAL WAVEGUIDE HAVING LOW COUPLING LOSSES BETWEEN THE RIDGE OPTICAL WAVEGUIDE AND AN OPTICAL FIBRE, AND A RIDGE OPTICAL WAVEGUIDE MADE USING THIS METHOD

摘要

The invention relates to a method for producing a ridge optical waveguide (40) having low coupling losses between the ridge optical waveguide (40) and an optical fibre (5), comprising the following steps: forming (100) an optical waveguide on the surface of a dielectric substrate (10), the optical waveguide having a first end (A) and a second end (B) opposite the first end (A); cutting out (200) two parallel recesses (R1, R2) spaced apart by a distance wr on the surface of the dielectric substrate in order to form a rigid optical waveguide (40) with an increased width (wr) between the two recesses (R1, R2). The method is characterised in that the recesses are cut such that the depth of each recess (R1, R2) changes continuously and gradually between a zero depth at the height of the first end of the optical waveguide and a maximum depth (H_m) at a pre-determined distance (l_p) from the first end.