COUPLING METHOD AND COUPLING DEVICE FOR OPTICAL WAVEGUIDE AND SINGLE-MODE OPTICAL FIBRE

摘要

A method and an apparatus for coupling an optical waveguide to a single-mode fiber are disclosed. The method includes: forming a locating slot (23) on a substrate (21), where a first optical waveguide (22) is further disposed on the substrate (21), one end of the first optical waveguide has an inverted taper structure (22a) whose width is gradually decreased, and a taper tip of the inverted taper structure (22a) is parallel to a center line of the locating slot (23); horizontally fastening, into the locating slot (23), a single-mode fiber (24) with one end having an optical fiber taper structure (24a) whose diameter is gradually decreased, so that the end, having the optical fiber taper structure (24a), of the single-mode fiber (24) is extended outside the locating slot (23) along a direction of the first optical waveguide; and disposing a second optical waveguide (25) on the substrate according to a location of the first optical waveguide (22) and a location of the single-mode fiber (24), so that the second optical waveguide (25) is coupled to the first optical waveguide (22) and the single-mode fiber (24). The provided method for coupling an optical waveguide to a single-mode fiber can lower an alignment precision requirement on a coupling device and reduce production costs.