OPTICAL COUPLING MOUNT WITH SPOT SIZE CONVERTER

摘要

An optical coupling mount for use in coupling light between a semiconductor waveguide device and an optical fibre comprises a silica based spot size converter located on an optical bench with fiducial marks and protrusions, whereby the semiconductor device can be positioned in close alignment with the spot size converter. The spot size converter comprises a tapered upper waveguide located above a non-tapered lower waveguide. The dimensions of the spot size converter are such that a semiconductor device emitting a small, astigmatic optical beam can be efficiently coupled to a single mode fibre requiring a larger, concentric beam. Also provided is a thermal backplate with electrical routing patterns and which, when assembled with the optical bench, contact both the semiconductor device and corresponding electrical routing patterns on the optical bench, thereby providing a mechanically robust device with provision for simple connection to an external electrical power supply.