Optoelectronic Connector Assembly Reducing Optical Return Loss
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Solution Overview
Problem
Optical return loss occurs when optical signals travel between optically transmissive media, such as optical fibers and optoelectronic modules, leading to signal degradation or loss, particularly in single-mode and multi-mode optoelectronic systems, which affects the performance and cost of these systems.
Innovation Solution
The development of connector assemblies that optically and mechanically couple optoelectronic modules with optical fibers, featuring a receptacle and sleeve configuration with resilient materials and adhesive injection to minimize optical return loss, suitable for both short and long wavelength systems, and designed to comply with various optical fiber connector standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical signals travel between optically transmissive media (optical fiber and optoelectronic module), then optical communication is enabled, but optical return loss occurs causing signal degradation
Solution Approach 1:
The patent introduces an intermediary structure (connector assembly with receptacle and sleeve) between the optical fiber and optoelectronic module. This intermediary includes a ferrule with a polished end face that provides a controlled optical interface, and a resilient member that applies pressure to create an optical contact. The intermediary structure manages the optical transition between media while controlling return loss through its design features.
Solution Approach 2:
The patent employs parameter changes by using a resilient member that can be compressed to adjust the contact pressure between optical surfaces. By changing the compression parameter, the system optimizes the optical interface characteristics to minimize return loss while maintaining reliable signal transmission. The compression amount can be tuned to achieve optimal optical performance.
2Reliability
If connector assemblies are designed to reduce optical return loss, then signal quality improves, but assembly complexity increases
Solution Approach 1:
The patent merges multiple functions into a single integrated connector assembly structure. The receptacle, sleeve, ferrule, and resilient member are combined into one assembly that simultaneously provides mechanical coupling, optical alignment, and optical contact pressure. This integration reduces the number of separate components and simplifies the overall assembly process while maintaining the ability to control optical return loss.
Solution Approach 2:
The connector assembly is segmented into distinct functional components (receptacle, sleeve, ferrule, resilient member) that can be manufactured separately and then assembled. This segmentation allows each component to be optimized for its specific function while maintaining overall simplicity. The modular design enables easier manufacturing and assembly compared to a fully integrated single-piece structure.
3Manufacturing precision
If resilient materials and adhesive injection are used to minimize optical return loss, then manufacturing precision improves, but manufacturing cost increases
Solution Approach 1:
The resilient member is designed to automatically provide the necessary contact pressure when compressed during assembly, without requiring additional adjustment mechanisms or complex positioning systems. The material's inherent elasticity self-regulates the optical interface pressure, eliminating the need for precision adjustment procedures and reducing manufacturing complexity while maintaining optical performance.
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
These connector assemblies reduce optical return loss, enhance manufacturing efficiency, and lower production costs by simplifying assembly while maintaining performance, particularly in single-mode and multi-mode systems, and can be integrated into existing products without size or structural modifications.
Implementation Method 1
a resilient member positioned within the receptacle and configured to compress the ferrule
Implementation Method 2
a channel defined between the ferrule and the receptacle to receive a material, such as an adhesive or adhesive material, to couple the ferrule to the receptacle
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
In one embodiment, an optoelectronic assembly may include at least one transmitter or at least one receiver, a sleeve, a housing, a fiber stub, and a receptacle. The sleeve may define a sleeve opening sized and shaped to receive an optically transmissive portion of an optical fiber. The housing may define a housing cavity at least partially enclosing the transmitter or the receiver. The housing may include a lens port defining a lens port opening. The fiber stub may be positioned at least partially in the sleeve opening and the lens port opening. The receptacle may define a receptacle opening. The lens port, the sleeve and the fiber stub may be positioned at least partially in the receptacle opening.