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1. (WO2017152449) A WAVEGUIDE CROSSING

Pub. No.:    WO/2017/152449    International Application No.:    PCT/CN2016/078468
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Wed Apr 06 01:59:59 CEST 2016
IPC: G02B 6/12
G02B 6/122
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
Inventors: DUMAIS, Patrick
Title: A WAVEGUIDE CROSSING
Abstract:
A waveguide crossing includes a first waveguide(200) and a second waveguide(300) intersecting the first waveguide(200) such that a gap(G) equal to a width of the second waveguide(300) is formed in the first waveguide(200), the second waveguide(300) having a centerline(C L) defining a plane of symmetry. The first waveguide(200) has a first waveguide section(202) through which a single optical mode propagates, followed by a first non-adiabatic diverging taper(204), followed by a second waveguide section(206) wider than the first waveguide section(202) through which two even-order optical modes propagate, followed by a second non-adiabatic diverging taper(208), followed by a third waveguide section(210) wider than the second waveguide section(206) through which three even-order optical modes propagate. The three even-order modes synthesize to form a quasi-Gaussian beam that self-replicates symmetrically across the gap(G), thereby providing a low-loss waveguide crossing useful for photonic switching.