Linear Photonic Processor for Low-Latency Matrix Operations
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Solution Overview
Problem
Conventional electrical processors face limitations in speed and efficiency due to electrical properties like impedance, leading to delays and heat generation issues, especially in processing large datasets.
Innovation Solution
A photonic processing architecture that uses light signals to perform matrix-vector multiplication by modulating the intensity of light signals, attenuating or amplifying them to perform multiplication, and detecting the signals with optical detectors to produce the final output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional electrical processors are used for processing large datasets, then general-purpose computing capability is maintained, but processing speed and efficiency deteriorate due to electrical impedance and heat generation
Solution Approach 1:
The patent replaces electrical signal processing with optical signal processing. Optical signals use photons instead of electrons, eliminating electrical impedance and associated power dissipation. The system uses optical modulators to encode data onto light waves, optical switches to route signals, and optical detectors to convert optical signals back to electrical signals for output, thereby achieving high-speed processing with minimal energy loss.
Solution Approach 2:
The patent changes the fundamental parameter of signal transmission from electrical to optical domain. By operating in the optical regime, the system achieves higher bandwidth and lower loss characteristics. The optical signals can carry more information simultaneously and experience minimal attenuation, directly addressing the productivity and energy loss contradiction.
2Loss of time
If conventional electrical processors are used, then computational functionality is maintained, but latency increases due to electrical signal propagation delays
Solution Approach 1:
The patent substitutes electrical signal transmission with optical signal transmission throughout the processing architecture. Optical signals propagate at the speed of light, which is fundamentally faster than electrical signals in conductive media. This substitution eliminates propagation delays inherent in electrical processors and reduces overall processing latency.
3Productivity
If optical signals are used for processing, then processing efficiency is improved, but device complexity increases due to the need for optical modulators, switches, and detectors
Solution Approach 1:
The patent designs optical components to perform multiple functions. For example, optical modulators not only modulate signals but also act as signal sources and routing elements. The optical switch fabric is designed to handle both signal routing and processing functions. This multi-functionality reduces the total number of discrete components needed, thereby managing device complexity while maintaining high processing efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces latency and power dissipation, enabling faster and more efficient processing of large datasets compared to conventional electrical processors.
Implementation Method 1
uses light signals to perform matrix-vector multiplication by modulating the intensity of light signals
Implementation Method 2
detecting the signals with optical detectors to produce the final output
Data Source
AI summary
Systems and methods for performing signed matrix operations using a linear photonic processor are provided. The linear photonic processor is formed as an array of first amplitude modulators and second amplitude modulators, the first amplitude modulators configured to encode elements of a vector into first optical signals and the second amplitude modulators configured to encode a product between the vector elements and matrix elements into second optical signals. An apparatus may be used to implement a signed value of an output of the linear processor. The linear photonic processor may be configured to perform matrix-vector and/or matrix-matrix operations.