Optical Module Signal Segmentation for Reduced Loss and Crosstalk
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Solution Overview
Problem
Existing optical modules face challenges in optimizing signal transmission paths to reduce signal loss and crosstalk while accommodating multiple signal types efficiently, particularly in high-speed and low-cost optical-electro conversions.
Innovation Solution
The optical module employs a stacked arrangement of circuit boards and flexible circuit boards to segregate high-speed and non-high-speed signals, using different flexible circuit boards for each type, and optimizes signal paths to minimize loss and crosstalk, with a housing design for electromagnetic shielding and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple signal types are transmitted through a single circuit board, then device complexity is reduced, but signal loss and crosstalk increase
Solution Approach 1:
The patent divides the signal transmission system into separate rigid circuit boards for high-speed signals and flexible circuit boards for non-high-speed signals. This segmentation isolates different signal types to prevent crosstalk and reduce signal loss, while the modular design keeps the overall system complexity manageable through standardized interfaces and connection methods.
2Ease of manufacture
If high-speed and non-high-speed signals share the same transmission path, then manufacturing cost is reduced, but signal transmission performance deteriorates
Solution Approach 1:
The patent implements separate transmission paths using different board types - rigid circuit boards for high-speed signals and flexible circuit boards for non-high-speed signals. This segmentation ensures optimal signal transmission performance for each type while maintaining manufacturing feasibility through standardized components and assembly processes.
Solution Approach 2:
The patent applies different board technologies to different signal transmission requirements. High-speed signals use rigid circuit boards with optimized trace designs and materials, while non-high-speed signals use flexible circuit boards. This local differentiation ensures each signal type receives the appropriate transmission medium, improving overall system reliability without requiring complete redesign of the entire transmission system.
3Reliability
If signal paths are optimized to reduce crosstalk, then signal transmission performance is improved, but device complexity increases
Solution Approach 1:
The patent reduces crosstalk by segmenting the signal transmission system into separate high-speed and non-high-speed paths using different board types. This physical separation simplifies the signal path configuration compared to implementing complex shielding and routing on a single board, while still achieving excellent signal isolation and transmission performance.
Data Source
AI summary
An optical module including: a first circuit board; a second circuit board; a light emitting component, arranged above the first circuit board and electrically connected to a first and a second flexible circuit board and a second flexible circuit board; a light receiving component arranged below the light emitting component and being electrically connected to a third flexible circuit board; the first flexible circuit, with two ends thereof being electrically connected to the light emitting component and a non-high-speed signal pad provided on the second circuit board, respectively; the second flexible circuit board, with two ends thereof being electrically connected to the light emitting component and a first high-speed signal pad provided on the first circuit board, respectively; the third flexible circuit board, with two ends thereof being electrically connected to the light receiving component and a second high-speed signal pad provided on the first circuit board, respectively.