Optical Module Bottom-Side Airflow With EMC Shielded Cooling
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Solution Overview
Problem
Large scale computing environments face challenges in efficiently cooling high-power optical modules while managing electromagnetic interference (EMI) and adhering to electromagnetic compatibility (EMC) regulations, as conventional air cooling methods struggle with increased heat dissipation and radiation from electronic components.
Innovation Solution
The implementation of pluggable optical modules with designed airflow paths and EMC shields that enhance cooling efficiency by directing airflow through the modules and minimizing EMI, using recessed surfaces and reduced fin structures to optimize airflow and reduce radiation emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional air cooling methods are used for optical modules, then the cooling system is simple, but the cooling efficiency is insufficient for high-power modules
Solution Approach 1:
The optical module is divided into distinct functional regions with dedicated airflow paths: an intake region with notch for cool air entry, a middle region with recessed surfaces for heat dissipation, and an exhaust region for hot air exit. This segmentation allows optimized cooling for each zone while managing overall thermal flow efficiently.
Solution Approach 2:
The invention introduces bottom-side airflow through recessed portions and notches, adding a vertical dimension to the cooling approach. Instead of only front-to-back cooling, air enters from the bottom through the intake notch and recessed surfaces, creating multi-directional airflow that enhances heat removal from high-power components.
2Temperature
If air vents are provided in the chassis for cooling, then cooling airflow is improved, but electromagnetic radiation can exit and interfere with other systems
Solution Approach 1:
EMC shields are selectively positioned in specific locations where electromagnetic radiation may escape, such as near the exhaust region and along sidewalls. The shields are not placed throughout the entire module but only at critical radiation escape points, maintaining cooling airflow while blocking harmful emissions locally where needed.
Solution Approach 2:
EMC shields act as intermediary elements between the internal electronic components and the external environment. These shields intercept and redirect electromagnetic radiation before it can escape through air vents or chassis openings, while still allowing thermal airflow to pass through designated pathways.
3Power
If power density in optical modules increases, then data rates and energy consumption improve, but heat dissipation becomes more difficult to manage
Solution Approach 1:
Cool air is directed through intake notches and recessed surfaces to predetermined locations near high-power components before heat generation reaches peak levels. The airflow path is pre-configured to target hot spots in the module, ensuring immediate cooling of high-density power regions as air enters the module.
Solution Approach 2:
The invention modifies the physical parameters of the airflow path including the depth and positioning of recessed portions, the size and location of intake notches, and the configuration of exhaust openings. These parameter changes optimize air velocity and distribution patterns to match the thermal load characteristics of high-power optical modules.
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 provides enhanced cooling and reduced EMI, ensuring effective heat management and compliance with EMC standards, thereby maintaining system performance and reliability.
Implementation Method 1
cooling systems provide cooling airflows to and through the components of the computing systems
Implementation Method 2
The module device includes a heatsink
Implementation Method 3
a first airflow channel is formed from the intake notch and between the first recessed portion and the first cage sidewall; and a second airflow channel is formed between the second recessed portion and the second cage sidewall, where the first airflow channel and the second airflow channel provide a cooling airflow path from the intake notch to the exhaust sidewall
Implementation Method 4
an electromagnetic compatibility (EMC) shield positioned between fins of the series of fins
Data Source
AI summary
The module device assemblies and systems described herein provide for increased cooling airflow through electronic devices via airflow channels. The module device assemblies also prevent radiation or other noise from emitting through the device assemblies using electromagnetic compatibility (EMC) shields.