Integrated Optical Transceiver Substrate Design
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Solution Overview
Problem
Current optical interconnect technologies for computing applications face challenges such as high complexity, cost, power consumption, and form factor issues, along with difficulties in manufacturing and alignment, which are not adequately addressed by traditional copper-based solutions or existing optical transceivers.
Innovation Solution
An electro-optical transceiver design featuring a planar substrate with integrated components, including a multi-port lens assembly and heat-spreading device, which simplifies manufacturing, reduces size, and uses multi-mode fibers for alignment, enabling automated assembly and lower power consumption, while sharing common components across multiple channels to reduce packaging costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional copper trace technology is used for interconnections, then manufacturing is simple and cost-effective, but bandwidth is limited to 15-20 Gigabits per second due to signal degradation, power dissipation, and electromagnetic interference
Solution Approach 1:
The patent replaces electrical copper trace interconnections with optical fiber interconnections. This substitution eliminates the harmful effects of electrical signals (signal degradation, electromagnetic interference, power dissipation) by using light-based transmission through optical fibers, enabling bandwidth exceeding 100 Gigabits per second while removing the physical limitations of copper technology.
2Productivity
If optical interconnect technology is implemented using conventional transceivers, then bandwidth capability increases, but manufacturing complexity, cost, and power consumption increase significantly
Solution Approach 1:
The patent merges the optical transceiver functionality directly with the network interface card (NIC) by integrating optical components (VCSELs, photodetectors, lenses) and electrical components onto a single substrate. This consolidation eliminates the need for separate optical modules and complex packaging, reducing manufacturing complexity while maintaining high bandwidth capabilities.
Solution Approach 2:
The substrate serves multiple functions simultaneously: it acts as the structural base for mounting components, provides electrical interconnections between components, enables heat dissipation pathways, and facilitates optical signal transmission. This multi-functionality reduces the overall system complexity and component count.
3Adaptability or versatility
If optical transceivers are designed with separate transmitter and receiver modules, then functionality is complete, but form factor increases and automated assembly becomes difficult
Solution Approach 1:
The patent combines separate transmitter and receiver modules into a single integrated optical engine on one substrate. The substrate mounts both VCSEL arrays (transmitters) and photodetector arrays (receivers) along with necessary optical components, creating a compact unified structure that maintains full transceiver functionality while enabling automated assembly through standardized mounting procedures.
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
The solution decreases manufacturing complexity and cost, achieves a smaller form factor, and lowers power consumption, while enabling precise alignment and mass-production capabilities, effectively addressing the limitations of existing optical interconnect technologies.
Implementation Method 1
The transceiver includes an array of vertical-cavity surface-emitting lasers (VCSELs)
Implementation Method 2
The transceiver includes an array of photodetectors
Implementation Method 3
The transceiver includes a multi-port lens assembly to receive light from optical fibers, and transmit light to optical fibers
Implementation Method 4
A heat-spreading device affixed to the substrate dissipates heat from the integrated circuit
Data Source
AI summary
A compact optical transceiver is provided in which a substrate provides for an alignment surface for optical fibers and a lens assembly provides the necessary optical paths for coupling to photodiode and photodetector structures. Appropriate electrical connections on the substrate enable the substrate to be directly connected to a printed circuit board, grid array socket, and the like.