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Ultra-compact SOI-based higher-order mode pass wavelength demultiplexer
Applied Optics
|April 3, 2024
Summary
We developed an ultra-compact mode filtering wavelength demultiplexer that routes Transverse Electric (TE) 1 mode signals while blocking TE0 mode. This novel device integrates wavelength routing and mode filtering for advanced optical communication systems.
Area of Science:
- Photonics and Optical Engineering
- Integrated Optics
- Nanophotonics
Background:
- Wavelength division multiplexing (WDM) is crucial for optical communication.
- Mode-division multiplexing (MDM) increases data capacity.
- Integrating WDM and MDM requires advanced optical components.
Purpose of the Study:
- To design an ultra-compact mode filtering wavelength demultiplexer.
- To achieve simultaneous wavelength routing and mode filtering.
- To enable high-density mode-wavelength multiplexing systems.
Main Methods:
- Utilized topology optimization algorithm for device design.
- Designed a device with a footprint of 3µm x 3µm.
- Simulated performance for Transverse Electric (TE) 1 and TE0 modes at 1310nm and 1550nm.
Main Results:
- Achieved ultra-compact footprint (3µm x 3µm).
- Demonstrated routing of TE1 mode signals at 1310nm and 1550nm.
- Blocked fundamental Transverse Electric (TE) 0 mode input.
- Insertion losses of 1.26dB (C-band) and 1.47dB (O-band).
- Low inter-port crosstalk (-21.25dB to -30.99dB).
- High extinction ratios (24.02dB to 30.12dB) between TE1 and TE0 modes.
Conclusions:
- The proposed device uniquely combines wavelength routing and mode filtering.
- Its small footprint and selective filtering capabilities are vital for future optical networks.
- The device shows significant potential for high-density mode-wavelength multiplexing systems.
