Photonic Register Circuit With Feedback for Phase-Stable Logic
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Solution Overview
Problem
Existing photonic computing technologies lack efficient photonic flip-flops, registers, and counters that can support high-speed processing required for advanced applications such as neural networks, with existing components facing challenges in amplitude attenuation and phase errors.
Innovation Solution
Implementing photonic circuits as cascaded connections of photonic NAND gates with feedback and nonlinear optical components to create photonic SR flip-flops, pre-flip-flops, and D-type registers, which include photonic combiners and phase shifters to manage amplitude and phase errors, allowing for multiplexed light signals and parallel processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If photonic circuits are implemented using existing photonic components, then photonic processing can be achieved, but amplitude attenuation and phase errors occur that limit processing speed and reliability
Solution Approach 1:
The patent implements feedback mechanisms in photonic flip-flops and registers where output signals are fed back to input stages through photonic pathways. This feedback enables error correction of amplitude attenuation and phase errors, maintaining signal integrity while allowing high-speed parallel processing to proceed without being bottlenecked by signal degradation
Solution Approach 2:
The patent employs phase shifters and amplitude modulators that dynamically adjust optical parameters (phase and amplitude) of photonic signals. By changing these parameters in real-time, the system compensates for attenuation and phase errors accumulated during processing, enabling both high reliability and high processing speed
2Productivity
If photonic components are designed for high-speed processing, then processing speed improves, but amplitude attenuation and phase errors increase
Solution Approach 1:
High-speed photonic processing elements incorporate feedback loops that continuously monitor and correct signal degradation. The feedback mechanism detects amplitude attenuation and phase errors introduced by high-speed operation and applies compensatory adjustments, allowing the system to maintain signal integrity even at elevated processing speeds
Solution Approach 2:
The patent implements pre-compensation techniques where potential amplitude attenuation and phase errors are anticipated and counteracted before they significantly degrade signal quality. Buffer stages and equalization circuits are built into the high-speed photonic components to cushion against expected signal degradation during rapid processing operations
Data Source
AI summary
A photonic circuit operating as a photonic register includes a first set of cascading photonic gates coupled to a second set of cascading photonic gates. The first set of cascading photonic gates generates, at a first output, a first intermediate output signal based on a first photonic input signal and a second photonic input signal, and generates, at a second output, a second intermediate output signal based on the second intermediate output signal and the second photonic input signal. The second set of cascading photonic gates generates, at a first output, a first photonic output signal based on the first intermediate output signal and a second photonic output signal that was generated at a second output. The second set of cascading photonic gates generates, at the second output, the second photonic output signal based on the first intermediate output signal and the first photonic output signal.