Two-dimensional wavelength demultiplexing employing multilevel arrayed waveguides.

Area of Science:

• Optoelectronics
• Photonics
• Waveguide Optics

Background:

• Traditional optical wavelength demultiplexing often faces limitations in scalability and density.
• Existing arrayed waveguide gratings (AWGs) are typically designed for one-dimensional dispersion.

Purpose of the Study:

• To demonstrate a novel two-dimensional (2D) optical wavelength demultiplexing technique.
• To introduce the 2D arrayed waveguide grating (2D-AWG) as a key component for advanced optical signal processing.

Main Methods:

• Utilizing multilevel arrayed waveguides to create a 2D diffraction grating (2D-AWG).
• Exploiting 2D diffraction orders in both x and y directions for wavelength demultiplexing.
• Designing dispersion components and spatial free spectral range for high diffraction efficiency.

Main Results:

• Successful demonstration of 2D optical wavelength demultiplexing.
• Achieved wavelength demultiplexing by exploiting either the x or y direction diffraction orders.
• Demonstrated feasibility of integrating the 2D-AWG with input/output ports using multilevel lightwave circuits (MLC).

Conclusions:

• The 2D-AWG offers a promising approach for large-scale and high-density optical multiplexers/demultiplexers.
• The proposed method overcomes limitations of conventional 1D AWGs.
• Integration with MLCs facilitates compact and efficient photonic integrated circuits.