Multicore Optical Fiber with Hexagonal Core Arrangement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current optical fiber technologies face challenges in increasing bandwidth density without significant cost increases, as recent developments in bit rate and wavelength division multiplexing have not met demand, and spatial division multiplexing approaches using multiple spatial modes in multimode and few-moded fibers are costly.
Innovation Solution
The development of multicore optical fibers with a hexagonally close-packed core configuration exhibiting bi-lateral symmetry, allowing for bi-directional data flow, and featuring an angular indication for connector alignment, which facilitates lower-cost interconnections and improved coupling methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If spatial division multiplexing approaches employing multiple spatial modes in multimode and few-moded fibers are used, then bandwidth density is improved, but interconnection cost increases significantly
Solution Approach 1:
The invention divides the optical fiber into multiple independent cores (e.g., 3-core, 4-core, 6-core, or 12-core configurations) within a single cladding structure. Each core functions as an independent transmission pathway, enabling spatial division multiplexing without requiring complex mode-multiplexing techniques. This segmentation approach achieves high bandwidth density while maintaining compatibility with standard connector and coupling technologies, thereby avoiding the high interconnection costs associated with traditional spatial mode approaches.
2Quantity of substance
If the number of pathways per unit area within the fiber is increased, then bandwidth density is improved, but device complexity increases
Solution Approach 1:
The invention embeds multiple cores within a single cladding structure, creating a nested configuration where multiple transmission pathways are contained within one outer boundary. This nested architecture allows increased bandwidth density without proportionally increasing the overall fiber diameter or external complexity. The cores are arranged in compact geometries (linear, triangular, or hexagonal patterns) that optimize space utilization while maintaining manageable structural complexity.
3Adaptability or versatility
If bi-directional data flow is accommodated through symmetric core configuration, then data transmission capability is improved, but manufacturing precision requirements increase
Solution Approach 1:
While the overall core configuration exhibits bilateral symmetry to enable bidirectional data flow, the invention employs asymmetric core positioning patterns (such as linear, triangular, or hexagonal arrangements) that are optimized for manufacturing. The symmetry is achieved through replication of core patterns rather than requiring perfect geometric symmetry, which relaxes manufacturing precision requirements. For example, a 3-core linear arrangement or a 6-core hexagonal pattern provides functional symmetry for bidirectional transmission while being amenable to standard fabrication tolerances.
Data Source
AI summary
A multicore optical fiber that includes seventeen cores arranged in a hexagonally close-packed configuration, each core having a core center and comprising silica and an up-dopant; and a cladding region surrounding the seventeen cores, the cladding region having a cladding edge, an outer diameter, and a cladding composition comprising silica. The outer diameter of the cladding region is between about 100 microns and 150 microns. Further, the hexagonally close-packed configuration has bi-lateral symmetry to accommodate bi-directional data flow within the fiber.