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    • 10. 发明公开
    • AN OPTICAL STRUCTURE
    • EP4283354A1
    • 2023-11-29
    • EP23174302.2
    • 2023-05-19
    • Axenic Limited
    • WALKER, Robert
    • G02B6/125G02B6/28G02B6/12
    • An optical structure comprising
      a multimode interference waveguide section, the multimode interference waveguide section comprising an input face, an output face and sidewalls extending therebetween, the sidewalls extending substantially parallel to a length axis;
      at least one input optical waveguide abutting the input face and spaced apart from the sidewalls;
      at least one output optical waveguide abutting the output face and spaced apart from the sidewalls;
      the input face being divided into first and second input face shoulder portions arranged on opposite sides of the at least one input optical waveguide; and
      the output face being divided into first and second output face shoulder portions arranged on opposite sides of the at least one output optical waveguide;
      the optical structure further comprising at least one external reflector appendage, the at least one external reflector appendage comprising a reflector portion integrally extending from a shoulder portion and an appendage waveguide integrally extending from the reflector portion along an axis inclined to the length axis, the reflector portion comprising a reflector wall arranged such that light travelling parallel to the length axis which is incident on the reflector wall is reflected into the appendage waveguide.