Optical-to-Electrical Receiver ICs for Data Center Interconnects
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Solution Overview
Problem
Data centers face challenges in scaling bandwidth without increasing power consumption and costs, as electronic signal integrity limitations and high power demands hinder the efficiency of traditional electrical switch designs.
Innovation Solution
Implementing multibus optical interconnect fabrics with optical-to-electrical and electrical-to-optical receiver and transceiver integrated circuits that utilize wavelength division multiplexing and low-loss waveguides to efficiently transmit and receive optical signals, reducing power consumption and enabling higher spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the bandwidth of electrical signal paths is increased to meet growing data center demands, then the data rate capability improves, but power consumption and cost increase substantially
Solution Approach 1:
The patent substitutes electrical signal transmission with optical signal transmission using photonic integrated circuits. Optical signals replace electrical signals in interconnects, enabling higher bandwidth without the power consumption penalties associated with scaling electrical pathways. This fundamental substitution allows data centers to achieve higher data rates while reducing the power consumption that would otherwise increase substantially with electrical bandwidth scaling.
2Speed
If the bandwidth of electrical signal paths is increased to meet growing data center demands, then the data rate capability improves, but system cost increases substantially
Solution Approach 1:
The patent replaces electrical interconnect infrastructure with optical interconnect infrastructure using photonic integrated circuits. This substitution enables higher bandwidth capabilities without the substantial cost increases that would accompany scaling electrical systems. The optical approach, particularly using standard telecommunication wavelength infrastructure, provides a cost-effective pathway to higher data rates compared to scaling electrical signal paths.
3Speed
If electronic switch designs are scaled up to increase bandwidth, then the data rate improves, but signal integrity deteriorates
Solution Approach 1:
The patent substitutes electrical signal transmission with optical signal transmission to avoid signal integrity limitations. Optical signals in photonic integrated circuits do not suffer from the same electromagnetic interference, crosstalk, and attenuation issues that plague scaled electrical interconnects. This substitution enables higher bandwidth operation while maintaining signal integrity, as optical signals can traverse longer distances and higher bandwidth pathways without degradation.
4Speed
If the proportion of power consumed by electronic interconnects increases with higher data rates, then the data rate improves, but energy efficiency deteriorates
Solution Approach 1:
The patent replaces electrical interconnect power consumption with optical interconnect power consumption using photonic integrated circuits. Optical transmission is inherently more energy-efficient at high bandwidths because it avoids the resistive losses and electromagnetic interference mitigation requirements of electrical systems. The substitution enables higher data rates with reduced power consumption, directly improving energy efficiency in data center switching infrastructure.
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 solution allows for multiple generations of bandwidth scaling with reduced interconnect power consumption, improving energy efficiency and cost-effectiveness in data center switching infrastructure.
Implementation Method 1
a detector array, a transimpedance amplifier array, a sampler array
Data Source
AI summary
This disclosure is directed to optical-to-electrical receiver and transceiver integrated circuits that can be used to send and receive multiple optical signal data streams using at least one optical bus. In one aspect, a fan-in integrated circuit of a node includes an arbiter/multiplexer, and at least one receiver. Each receiver is electronically connected to the arbiter/multiplexer. Each receiver receives at least one optical signal over an optical broadcast bus and converts the optical signals into a data stream encoded in electronic signals. The arbiter/multiplexer selects one receiver at a time to send an electronic signal to the arbiter/multiplexer and outputs the electronic signal to the node for processing.