Dual-Side Optoelectronic Subassembly RF Line Control
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Solution Overview
Problem
High-speed fiber optic networks face challenges in miniaturizing optoelectronic assemblies while maintaining RF performance and adhering to industry standards, as existing designs struggle with space constraints and increased production costs due to hermetic sealing and tight tolerance requirements.
Innovation Solution
The proposed solution involves positioning optoelectronic components on both the top and bottom of a substrate, with electrical components on one side and optoelectronic transducers on the other, allowing for optimized RF line control and reduced size, thereby simplifying production and maintaining performance standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If optoelectronic components are positioned on both top and bottom of substrate, then space utilization is improved and device size is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent positions optoelectronic components on both the top and bottom surfaces of the substrate, transitioning from a single-sided to a dual-sided configuration. This utilizes the third dimension (z-axis) to increase component density without expanding the device footprint, effectively resolving the contradiction between miniaturization and manufacturing complexity by distributing components across multiple surfaces.
Solution Approach 2:
The substrate is divided into distinct top and bottom surfaces, each serving specific functional zones. Electrical components are segregated on one side while optoelectronic transducers are positioned on the other, creating modular sections that can be manufactured and assembled independently, thereby reducing overall manufacturing complexity despite the dual-sided configuration.
2Reliability
If electrical components and optoelectronic transducers are separated on opposite sides of substrate, then RF line control is optimized and signal integrity is improved, but interconnection complexity increases
Solution Approach 1:
The substrate acts as an intermediary structure between electrical components and optoelectronic transducers. By providing a dedicated mounting surface with integrated interconnection pathways, the substrate mediates the interaction between the two component types, optimizing RF line control and signal integrity while managing the complexity of interconnections through structured routing.
3Productivity
If components are densely packed to reduce size, then productivity is improved through smaller form factor, but manufacturing precision requirements increase
Solution Approach 1:
The device is segmented into distinct functional regions on the top and bottom surfaces, with electrical components on one side and optoelectronic transducers on the other. This spatial segmentation creates larger effective placement areas for each component type, reducing the precision requirements compared to dense single-sided packing, while still achieving compact overall dimensions that improve productivity.
Data Source
AI summary
This disclosure generally relates to high-speed fiber optic networks that use light signals to transmit data over a network. The disclosed subject matter includes devices and methods relating to header subassemblies and/or optoelectronic subassemblies. In some aspects, the disclosed devices and methods may relate to a header subassembly that can include: a substrate with a substrate top and a substrate bottom; at least one optoelectronic transducer on the substrate top; at least one top electrical component on the substrate top, the electrical component can be operably coupled with the optoelectronic transducer; and at least one bottom electrical component on the substrate bottom, the bottom electrical component can be operably coupled with the optoelectronic transducer.