Multimode Fiber Core Alignment via Brightness Profile Analysis
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Solution Overview
Problem
Current methods lack the capability to accurately align the cores of multimode optical fibers, which is critical for efficient light transmission and network functionality, especially with the increasing use of high-powered light sources.
Innovation Solution
A control system and method that utilize a light source, camera, and alignment platform to produce brightness profiles, determine cladding and core center positions, calculate concentricity errors, and align multimode optical fibers based on these errors, ensuring precise alignment along the X and Y axes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If cladding alignment methods are used for multimode optical fibers, then the alignment process is simple and fast, but the core alignment precision is insufficient leading to light loss
Solution Approach 1:
The patent introduces a brightness profile analysis system as an intermediary between the cladding alignment method and core alignment requirement. By capturing light transmission brightness profiles and analyzing them to determine core positions, the system mediates between the simple cladding alignment approach and the need for precise core alignment, enabling accurate core positioning without directly complicating the alignment mechanism
Solution Approach 2:
The patent replaces direct mechanical core alignment mechanisms with an optical-based brightness profile analysis system. Instead of using complex mechanical positioning devices to align cores directly, the system uses light transmission characteristics and image analysis to determine core positions and guide alignment, substituting mechanical complexity with optical measurement and computational analysis
2Reliability
If core alignment for multimode optical fibers is implemented, then light transmission efficiency is improved, but the alignment process becomes more complex and time-consuming
Solution Approach 1:
The patent performs preliminary brightness profile analysis and core position determination before the actual alignment process. By pre-identifying core positions through brightness profile capture and analysis, the system prepares alignment information in advance, allowing the physical alignment process to proceed more quickly and efficiently without trial-and-error adjustments
Solution Approach 2:
The patent implements a feedback mechanism where brightness profiles are captured, analyzed to determine core positions and misalignment amounts, and this information is fed back to guide the alignment process. The system continuously monitors alignment status through brightness profile changes and adjusts positioning accordingly, enabling rapid convergence to optimal alignment without time-consuming manual adjustments
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
Enables precise and accurate alignment of multimode optical fiber cores, facilitating efficient splicing and light transmission by minimizing light loss at the splice point.
Implementation Method 1
a light source operable to produce a brightness profile for the first multimode optical fiber and for the second multimode optical fiber
Implementation Method 2
a camera operable to capture an image of the first multimode optical fiber and the second multimode optical fiber
Data Source
AI summary
Control systems and methods for aligning multimode optical fibers are provided. A method includes producing a brightness profile for a first and second multimode optical fiber. The method further includes determining a cladding center position and a core center position from the brightness profile of the first multimode optical fiber and from the brightness profile of the second multimode optical fiber. The method further includes calculating a concentricity error for the first multimode optical fiber based on the cladding center position and the core center position from the brightness profile of the first multimode optical fiber and for the second multimode optical fiber based on the cladding center position and the core center position from the brightness profile of the second multimode optical fiber. The method further includes aligning the first multimode optical fiber and the second multimode optical fiber based on the concentricity errors of the first multimode optical fiber and second multimode optical fiber.