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Echelle grating based mode demultipexer for vertical mode-division multiplexing.

Jun Chen, Yang Yang, Ning Zhu

|November 10, 2016

Summary

This summary is machine-generated.

This study introduces a compact mode multi/demultiplexer using an echelle grating for vertical multimode waveguides. This design enables simultaneous mode separation with low crosstalk and integrates wavelength division multiplexing (WDM) with mode-division multiplexing (MDM).

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Area of Science:

Photonics
Optical Communications
Integrated Optics

Background:

Mode-division multiplexing (MDM) is crucial for increasing optical communication capacity.
Vertical multimode waveguides offer advantages in system size compared to lateral designs.
Efficient mode demultiplexing is essential for practical MDM systems.

Purpose of the Study:

To propose and analyze a novel mode multi/demultiplexer based on an echelle grating.
To leverage vertical multimode waveguides for compact optical systems.
To demonstrate the integration of MDM with wavelength division multiplexing (WDM).

Main Methods:

Utilizing an echelle grating for simultaneous separation of guided modes.
Employing a vertical multimode bus waveguide architecture.
Theoretical analysis of propagation constants and modal crosstalk.

Main Results:

Achieved simultaneous separation of guided modes in a vertical multimode waveguide.
Demonstrated a theoretical modal crosstalk as low as -40dB.
Showcased the integration of WDM and MDM using a single echelle grating.

Conclusions:

The proposed echelle grating-based mode multi/demultiplexer enables compact and efficient optical systems.
The vertical waveguide scheme significantly reduces system size.
The integrated WDM and MDM approach simplifies design and enhances practicality for future optical networks.