Multicore Fiber Assembly for Optical Fiber Identification
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Solution Overview
Problem
Existing fiber assemblies with multicore fibers lack a reliable method to identify specific fibers when connected to optical communication members.
Innovation Solution
The fiber assembly is designed such that the optical characteristics of specific cores in each multicore fiber differ from those in other fibers, allowing identification through measurements using OTDR, OFDR, or OLTS, by utilizing differences in propagation loss, connection losses, and core connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multicore fibers are bundled to increase transmission capacity, then the transmission capacity is improved, but the ability to identify specific fibers is worsened
Solution Approach 1:
The patent applies local quality by introducing distinct optical characteristics to specific cores within the bundled multicore fibers. Each target core is designed with unique optical properties (such as different propagation loss, mode field diameter, or effective area) that differ from corresponding cores in other fibers. This allows identification devices to detect and distinguish specific fibers by measuring these localized optical differences, thereby resolving the identification difficulty while maintaining high transmission capacity through the bundled structure.
2Measurement precision
If optical characteristics are made different for identification, then the identification accuracy is improved, but the manufacturing complexity is worsened
Solution Approach 1:
The patent employs parameter changes by modifying optical parameters (such as propagation loss, mode field diameter, or effective area) of specific cores to create identifiable differences. These parameter variations can be achieved through controlled changes in core composition, diameter, or refractive index during the fiber drawing process. By adjusting these parameters within existing manufacturing capabilities, the patent enables accurate fiber identification without requiring fundamentally new or overly complex manufacturing processes.
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
This design enables accurate and efficient identification of specific multicore fibers by distinguishing their optical characteristics, reducing errors and inter-core crosstalk, and facilitating connection to optical communication members.
Implementation Method 1
a plurality of cores 11a to 11d, and a cladding 12 surrounding each of the cores 11a to 11d
Data Source
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Figure 3
Figure 4~5
AI summary
In a tape core wire T in which two or more multicore fibers 10a to 10d each including a plurality of cores 11a to 11d and a cladding 12 surrounding each of the cores 11a to 11d are bundled, an optical characteristic of a specific core 11a in a specific multicore fiber 10a is different from an optical characteristic of the core 11a corresponding to the specific core 11a of the multicore fiber 10a in another multicore fiber of the multicore fibers 10b to 10d.