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A Four Green TM/Red TE Demultiplexer Based on Multi Slot-Waveguide Structures.
1Faculty of Engineering, Holon Institute of Technology (HIT), Holon 5810201, Israel.
Materials (Basel, Switzerland)
|July 24, 2020
Summary
This study demonstrates a compact slot-waveguide demultiplexer for green and red light. The device efficiently separates wavelengths for improved data rates in visible light communication systems.
Area of Science:
- Photonics and Optical Engineering
- Integrated Optics
- Waveguide Devices
Background:
- Wavelength demultiplexers are crucial for optical communication systems.
- Slot-waveguide (SW) structures offer unique light confinement properties.
- Efficient demultiplexing in the visible spectrum is needed for Visible Light Communication (VLC).
Purpose of the Study:
- To demonstrate a novel four-channel green/red light wavelength demultiplexer using multi-slot-waveguide (SW) structures.
- To achieve polarization-independent operation for both transverse magnetic (TM) and transverse electric (TE) modes.
- To optimize the SW and S-bend (SB) parameters for high performance and compact size.
Main Methods:
- Design and simulation of a multi-slot-waveguide (SW) based demultiplexer.
- Utilizing a full vectorial beam propagation method (FV-BPM) for parameter optimization.
- Fabrication of a device comprising six-segment SW units and six S-bend (SB) SWs.
Main Results:
- Achieved a 1x4 demultiplexer for each polarization mode (TM/TE) in the green (530-560 nm) and red (630-660 nm) spectra.
- Demonstrated low power losses (<0.138 dB) and excellent crosstalk (< -21.14 dB).
- Obtained a compact device size of 104.5 µm with an optical spectrum of <9.39 nm.
Conclusions:
- The developed slot-waveguide demultiplexer shows high performance for visible light communication.
- The device's compact size and efficiency make it suitable for integration into Wavelength Division Multiplexing (WDM) systems.
- This technology can significantly increase data bit rates in Visible Light Communication (VLC) systems.
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