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A Three Demultiplexer C-Band Using Angled Multimode Interference in GaN-SiO₂ Slot Waveguide Structures.

Eduard Ioudashkin¹, Dror Malka¹

¹Faculty of Engineering, Holon Institute of Technology (HIT), Holon 5810201, Israel.

Nanomaterials (Basel, Switzerland)

|December 1, 2020

Summary

A novel angled multimode interference (AMMI) demultiplexer in gallium nitride (GaN)-silica (SiO2) slot waveguides offers improved performance for dense wavelength division multiplexing (DWDM) telecommunication systems.

Keywords:

AMMI C-band GaN demultiplexer slot-waveguide

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Area of Science:

Photonics and Optical Communications
Materials Science for Telecommunications

Background:

Dense wavelength division multiplexing (DWDM) increases data bitrate but faces limitations with increased channel count, requiring more components and higher energy consumption.
Existing DWDM systems can be constrained by the performance limitations of waveguide coupler devices and overall energy demands.

Purpose of the Study:

To propose and design a novel demultiplexer utilizing angled multimode interference (AMMI) within gallium nitride (GaN)-silica (SiO2) slot waveguides.
To address the performance limitations and energy consumption issues associated with conventional DWDM systems.

Main Methods:

Design of a demultiplexer based on angled multimode interference (AMMI) principles.
Utilizing gallium nitride (GaN) and silica (SiO2) materials for slot waveguide structures to confine infrared light.
Analysis of device performance under transverse electric (TE) field mode.

Main Results:

Successful demultiplexing of three infrared wavelengths in the C-band using a single AMMI coupler after 3.56 mm propagation.
Achieved low power loss (1.31–2.44 dB), wide bandwidth (12–13.69 nm), minimal back reflection (-47.64 to -48.76 dB), and low crosstalk (-12.67 to -15.62 dB).

Conclusions:

The proposed AMMI demultiplexer design in GaN-SiO2 slot waveguides shows significant potential for enhancing telecommunication system performance.
This innovative approach offers a promising solution for improving efficiency and capabilities in DWDM technology.