公开(公告)号：US20230384524A1

公开(公告)日：2023-11-30

申请号：US18324008

申请日：2023-05-25

Applicant: Axenic LImited

Inventor： Rob Walker

IPC: G02B6/293

CPC classification number: G02B6/29344

Abstract: 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.

公开(公告)号：US20230384623A1

公开(公告)日：2023-11-30

申请号：US18324022

申请日：2023-05-25

Applicant: Axenic Limited

Inventor： Rob Walker

IPC: G02F1/01

CPC classification number: G02F1/011 ,  G02F2202/101 ,  G02F2202/16 ,  G02F2201/127

Abstract: A travelling wave electro-optic modulator comprising



a substrate;
first and second parallel spaced apart electrode strips arranged on the substrate;
first and second optical waveguides arranged on the substrate, the optical waveguides being positioned between the first and second electrode strips and extending parallel thereto;
the first electrode strip comprising at least one portion extending proximate to the first optical waveguide;
the second electrode strip comprising at least one portion extending proximate to the second optical waveguide;
a semiconductive backplane layer arranged within the substrate and extending between the waveguides; and,
a matched termination connected to the first and second electrode strips, the matched termination comprising

(a) a serpentine electrically conductive strip arranged on the substrate and connecting the first and second electrode strips together; and,
(b) a semiconductive backplane matching element, the backplane matching element comprising a plurality of semiconductive backplane plates connected together by at least one semiconductive backplane arm, the plates and at least one backplane arm being arranged within the substrate, the plates being arranged proximate to the electrode strips such that each electrode strip is capacitively coupled to at least one backplane plate;


the serpentine electrically conductive strip being arranged such that at least a portion of its length is proximate to at least one backplane arm such that the two are electrically coupled together.