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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2023-05-11
Ultracompact Mode-Division (DE)Multiplexer Based on Tilted Lithium Niobate Waveguide
By
Hua Liu,

    Ms. Hua Liu

    College of Electronic and Electrical Engineering

    Henan Normal University

    China

    Homepage

Fang Wang,

    Dr. Fang Wang

    College of Electronic and Electrical Engineering

    Henan Normal University

    China

    Homepage

Tao Ma,

    Mr. Tao Ma

    College of Electronic and Electrical Engineering

    Henan Normal University

    China

    Homepage

Shoudao Ma,

    Dr. Shoudao Ma

    College of Electronic and Electrical Engineering

    Henan Normal University

    China

    Homepage

Yufang Liu

    Professor Yufang Liu

    College of Physics and Material Science

    Henan Normal University

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 110, 101-108, 2023
doi:10.2528/PIERL23021403 | Google Scholar

Abstract
We present an ultra-compact modular division (de) multiplexer [(de) MUX] based on the tilted lithium niobate waveguide, an asymmetric directional coupler (ADC) composed of silica-lithium niobate waveguide (SLNW) and lithium niobate waveguide (LNW) for the modular division multiplexer. The TE0 and TE1 modes were optimized by using the finite element method (FEM). By rationally designing the size of SLNW waveguide and LNW waveguide, TE0 mode light is injected into the In1 port of LNW waveguide, TE0 mode light is converted to TE1 mode in the coupling zone, and transmitted in the SLNW waveguide, output from the Out2 port. It show that the coupling length of this MUX is only 6 μm. At a working wavelength of 1.55 um, when TE0 enters the coupling area from port In1, the mode is coupled and converted to TE1; the TE1 mode is output from Out2; the value of IL is 0.87 dB; and the value of MCE is 99.5%. When TE0 enters from port In2, the TE0 mode is output from Out2, with 0.1 dB for IL, 99.7% for MCE, and -25 dB for CT.
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Citation
Hua Liu, Fang Wang, Tao Ma, Shoudao Ma, and Yufang Liu, "Ultracompact Mode-Division (DE)Multiplexer Based on Tilted Lithium Niobate Waveguide," Progress In Electromagnetics Research Letters, Vol. 110, 101-108, 2023.
doi:10.2528/PIERL23021403
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