Compact and high conversion efficiency mode-sorting asymmetric Y junction using shortcuts to adiabaticity.

Area of Science:

• Photonics and Optical Engineering
• Integrated Optics
• Waveguide Devices

Background:

• Mode-division multiplexing (MDM) is crucial for increasing data capacity in optical communication.
• Traditional Y junction mode sorters are often long, limiting integration density.
• Efficient on-chip mode manipulation is essential for advanced optical systems.

Purpose of the Study:

• To propose a compact and highly efficient asymmetric Y junction for mode multiplexing and demultiplexing.
• To overcome the length limitations of conventional adiabatic Y junctions.
• To improve conversion efficiency in on-chip optical mode sorters.

Main Methods:

• Utilizing invariant-based inverse engineering to design a compact Y junction.
• Simulating the performance of the asymmetric Y junction for mode sorting.
• Comparing the device performance against traditional adiabatic Y junctions.

Main Results:

• Achieved a compact device length for the asymmetric Y junction.
• Demonstrated high conversion efficiency, surpassing adiabatic devices.
• Successfully implemented mode multiplexing and demultiplexing functionalities.

Conclusions:

• The proposed asymmetric Y junction offers a promising solution for compact and efficient on-chip MDM.
• Invariant-based inverse engineering is effective for designing advanced photonic devices.
• This technology can significantly enhance the performance of future optical communication systems.