Reconfigurable linear combination of phase-and-amplitude coded optical signals

Area of Science:

• Optical computing
• Signal processing
• Nonlinear optics

Background:

• Traditional signal processing relies on electronic components, facing limitations in speed and power consumption.
• Optical signal processing offers potential for high-speed, low-power computation.
• Implementing complex arithmetic operations optically requires innovative device designs.

Purpose of the Study:

• To introduce a novel all-optical arithmetic unit capable of performing weighted addition and subtraction.
• To demonstrate a reconfigurable and format-transparent optical processing system.
• To evaluate the efficiency of the optical arithmetic unit for signal distortion compensation.

Main Methods:

• Utilizing Fourier-domain processing within a single nonlinear optical element.
• Implementing multiple simultaneous four-wave mixing processes.
• Operating with phase-and-amplitude coded optical signals.
• Configuring the system for weighted addition and subtraction calculations.

Main Results:

• Demonstrated an all-optical arithmetic unit with up to three channels operating at 40 Gb/s.
• The system performs calculations equivalent to a field dot-product of frequency channels with a static coefficient vector.
• Evaluated device efficiency by measuring bit-error-rate for distortion compensation.

Conclusions:

• The proposed all-optical arithmetic unit is reconfigurable and format transparent.
• The device effectively performs weighted addition and subtraction of optical signals.
• The system shows promise for high-speed optical signal processing applications, including distortion compensation.