Optical ASIC Interconnect Using WDM to Cut Conversion Loss
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Solution Overview
Problem
Current methods for connecting ASICs in network-connected computing systems, such as servers and switches, suffer from poor power efficiency and lossy connections due to the need for electrical-to-optical signal conversions, which limit communication speed and efficiency.
Innovation Solution
An optical connection system using wavelength-division multiplexing is implemented, allowing multiple ASICs to communicate via a single optical fiber by converting data to optical signals at different wavelengths, eliminating the need for electrical-to-optical conversions and enabling lossless communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If electrical-to-optical signal conversions are used to connect ASICs to interfaces, then data can be transmitted between devices, but power consumption increases and signal loss occurs
Solution Approach 1:
The patent extracts and eliminates the electrical-to-optical conversion components from the signal path between ASICs and interfaces. By using native optical signaling throughout the connection system, the conversion stages that cause both power consumption and signal loss are removed entirely, directly resolving the technical contradiction.
Solution Approach 2:
The patent substitutes electrical signaling mechanisms with optical signaling mechanisms in the internal connections between ASICs and interfaces. This replacement eliminates the need for electrical-to-optical converters, thereby reducing power consumption and preventing signal loss associated with conversion processes.
2Productivity
If multiple ASICs are connected to interfaces using traditional electrical connections, then device functionality is maintained, but communication speed and efficiency are limited
Solution Approach 1:
The patent replaces traditional electrical connection mechanisms with optical connection mechanisms for internal ASIC-to-interface communication. Optical signaling inherently provides higher bandwidth and faster transmission speeds compared to electrical connections, directly improving both communication efficiency and speed without compromising device functionality.
Solution Approach 2:
The patent changes the fundamental parameter of signal transmission from electrical to optical domain. This parameter change enables higher frequency operation, greater bandwidth utilization, and improved signal integrity, thereby enhancing communication efficiency and speed while maintaining full device functionality.
3Use of energy by moving object
If electrical connections are used between ASICs and interfaces, then system complexity is reduced, but power efficiency deteriorates
Solution Approach 1:
The patent extracts the electrical-to-optical conversion functionality from the system architecture and replaces it with direct optical connections. While this introduces optical components, it eliminates the power-inefficient conversion stages, achieving superior power efficiency despite the increased use of optical technology throughout the signal path.
Solution Approach 2:
The patent implements a universal optical connection architecture where optical signaling is used consistently across all internal connections between ASICs and interfaces. This unified approach, while requiring optical infrastructure, eliminates the need for separate electrical conversion subsystems, ultimately simplifying the overall system architecture while dramatically improving power 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 enhances communication efficiency, reduces power consumption, and supports high-speed data transfer without signal loss, facilitating the integration of multiple ASICs within a system.
Implementation Method 1
Each light source may provide a stream of light (e.g., a constant stream of light or continuous wave) to one or more electrical-to-optical (E-O) converter(s) in the ASIC package or on a same board as the ASIC package.
Implementation Method 2
An optical connection system using wavelength-division multiplexing is implemented, allowing multiple ASICs to communicate via a single optical fiber by converting data to optical signals at different wavelengths
Implementation Method 3
The connection system includes multiple optical fibers, configured for connecting to an ASIC at one side and an optical interface at the other side.
Data Source
AI summary
A system including multiple processing devices such as application-specific integrated circuits (ASICs). Each processing device is provided with light at one or more wavelengths. Each processing device outputs data, at the wavelength of the optical signal received, to one or more interfaces. Each interface outputs a multiplexed signal containing data from each of the processing devices on a single optic fiber.