Optical Module CDR Heat Dissipation via Segmented Thermal Pathways
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As the number of channels in parallel optical communications modules increases, effective heat dissipation becomes more challenging due to higher component density in a smaller area, leading to performance issues from heat generation.
Innovation Solution
The CDR circuitry is kept external to the module with its own dedicated heat dissipation device and convective cooling pathway, decoupling it from the thermal pathways of other components, allowing for separate and efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of channels in parallel optical communications modules is increased, then the data transmission capacity is improved, but the component density increases leading to more difficult heat dissipation
Solution Approach 1:
The patent divides the heat dissipation system into separate functional zones: a first heat dissipation device for the module components and a second heat dissipation device for the CDR circuitry. This segmentation allows each component to be cooled independently, resolving the heat dissipation difficulty that arises from increased channel density.
Solution Approach 2:
The CDR circuitry is extracted from the module and placed externally, with its own dedicated heat dissipation device and convective cooling pathway. This extraction separates the heat generation sources, allowing the module to achieve higher channel densities without being constrained by the thermal management requirements of the CDR circuitry.
2Area of stationary object
If components are mounted closer together to reduce module size, then space utilization is improved, but heat dissipation becomes less effective
Solution Approach 1:
The patent transitions from planar heat dissipation to three-dimensional convective cooling by directing airflow vertically over the heat sink devices. This dimensional change in the cooling approach allows for effective heat removal even when horizontal space is constrained, enabling compact module design without sacrificing thermal performance.
Solution Approach 2:
The patent introduces a baffle as an intermediary element that directs and channels the convective airflow over the heat dissipation devices. This baffle structure optimizes the cooling efficiency in the limited space available, allowing effective heat dissipation despite the compact arrangement of components.
3Device complexity
If CDR circuitry is integrated into the module, then device complexity is reduced, but heat dissipation pathways become coupled and less efficient
Solution Approach 1:
The patent segments the thermal management system into separate pathways: one for the module components and another for the CDR circuitry. Even though the CDR circuitry is integrated into the module, the heat dissipation is decoupled through separate heat sink devices and convective cooling pathways, ensuring that heat from one does not interfere with the other.
Solution Approach 2:
The patent applies different heat dissipation solutions to different parts of the module based on their specific thermal requirements. The module components have their own heat sink device optimized for their heat generation, while the CDR circuitry has a separate heat sink device with its own convective cooling pathway, allowing each component to operate in its optimal temperature range.
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 ensures that both the module and CDR circuitry operate within desired temperature ranges, maintaining performance and reducing system complexity while enabling higher channel densities and speeds.
Implementation Method 1
a first convective pathway for dissipating heat generated by the module separate from heat generated by the CDR circuitry, and a second convective pathway for dissipating heat generated by the CDR circuitry
Data Source
AI summary
In an optical communications system, the thermal pathway for dissipating heat generated by clock and data recovery (CDR) circuitry of an optical communications module is a separate from the thermal pathway that is used to dissipate heat generated by other components of the module. The CDR circuitry is external to the module and is provided with its own heat dissipation device. Keeping the CDR circuitry external to the module and providing it with its own heat dissipation device decouples the thermal pathway for dissipating heat generated by the CDR circuitry from the thermal pathways used for dissipating heat generated by other components of the module. This results in more effective heat dissipation and better component performance.