Design of a compact digital to analog converter with optical Kerr effect

Area of Science:

• Photonics and Optical Engineering
• Nanotechnology
• Solid-State Physics

Background:

• Photonic crystals offer unique light manipulation properties.
• Nonlinear optical effects are crucial for advanced photonic devices.
• Efficient digital-to-analog converters (DACs) are essential for optical signal processing.

Purpose of the Study:

• To propose a novel 2-bit digital-to-analog converter (DAC) design utilizing photonic crystals.
• To investigate the application of the nonlinear Kerr effect for optical control within the DAC.
• To achieve high sampling rates and minimize power loss in the proposed photonic DAC.

Main Methods:

• Design and simulation of a photonic crystal structure incorporating nonlinear ring resonators.
• Utilizing the nonlinear Kerr effect to modulate light intensity within the resonators.
• Employing Finite Difference Time Domain (FDTD) and Plane Wave Expansion (PWE) methods for analysis.

Main Results:

• The proposed photonic crystal DAC exhibits a compact footprint of 324 µm².
• Achieved a high sampling rate of 125 GS/s.
• Demonstrated minimal casualties in output power, indicating high efficiency.

Conclusions:

• The novel photonic crystal design effectively functions as a 2-bit digital-to-analog converter.
• The nonlinear Kerr effect provides effective control over the optical behavior of the DAC.
• This design presents a promising solution for high-speed, low-loss optical data conversion.