Multi-Core Fiber Ribbon Core Alignment
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Solution Overview
Problem
The connection of multi-core optical fibers is challenging due to their non-central core arrangement, leading to increased connection loss and difficulty in aligning cores in a specific direction, which hinders the formation of an optical fiber ribbon with uniform core arrangement.
Innovation Solution
An optical fiber ribbon with a circular cross-section, where the cores of each optical fiber are arranged at fixed positions along the longitudinal direction, and a method involving light introduction, detection, and rotation to maintain constant light leakage, ensuring uniform core alignment and easy connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multi-core fibers with non-central core arrangement are used to expand transmission capacity, then transmission capacity is improved, but connection difficulty increases
Solution Approach 1:
The patent applies preliminary action by pre-aligning the core arrangements of multiple multi-core fibers in the same direction before connection. This is achieved by using alignment marks or fixtures to ensure that cores at positions other than the center are aligned consistently across all fibers, thereby reducing connection difficulty while maintaining the expanded transmission capacity provided by multiple cores.
2Quantity of substance
If cores are arranged at positions other than the center to increase fiber density, then transmission capacity is improved, but alignment precision deteriorates
Solution Approach 1:
The patent introduces an intermediary element (alignment mark or fixture) that mediates between the non-central core arrangement and the connection process. This intermediary provides a reference for aligning cores at positions other than the center, ensuring consistent orientation across multiple fibers and maintaining alignment precision despite the offset core positions.
3Reliability
If optical fibers are aligned with fixed core positions to reduce connection loss, then connection quality is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies self-service by designing the fiber structure to include inherent alignment features (such as asymmetric cladding, markers, or geometric shapes) that automatically guide the alignment process. This reduces the need for complex external alignment equipment and procedures, thereby maintaining connection quality while reducing manufacturing complexity.
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
The solution facilitates the formation of an optical fiber ribbon with uniformly arranged cores, reducing connection loss and enhancing manufacturability, allowing for easy connection of multiple fibers while maintaining core alignment over the entire length.
Implementation Method 1
a light introducing step which introduces light into a core of the fiber, a light leaking step which leaks the light introduced into the core outside the optical fiber, a light detecting step which detects the light leaked in the light leaking step
Data Source
AI summary
Multi-core fibers are optical fibers each of which has a circular cross section. In each of the multi-core fibers, a plurality of cores are arranged at a prescribed interval, the peripheries thereof are covered by a cladding, and a resin coating is formed on the outer periphery of the cladding. In a cross section of this optical fiber ribbon, said cross section being orthogonal to the length direction, the multi-core fibers are arranged such that the cores of all of the multi-core fibers are all arranged in the same direction. The multi-core fibers are arranged such that central lines of the respective multi-core fibers, said central lines respectively linking three of the cores, all face the thickness direction of the optical fiber ribbon. Furthermore, in the optical fiber ribbon, the arrangement of the cores is substantially constant along the entire length of the optical fiber ribbon in the length direction.