Overcoated Fusion Splice Layout for High-Density Fiber Cables
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Solution Overview
Problem
Conventional fusion splice protection technologies, such as heat shrink protection sleeves, are bulky, inflexible, and limit the miniaturization of fiber optic components, while existing mass fusion splice methods only support one-dimensional arrays of optical fibers, restricting high-density fiber cable assemblies.
Innovation Solution
A fiber optic cable with overcoated non-coplanar groups of fusion spliced optical fibers, where the splices are rearranged into configurations other than one-dimensional arrays and encapsulated with a polymeric material, eliminating the need for heat shrink tubing and allowing for a more compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heat shrink protection sleeves are used to protect fusion splices, then the splices are protected from mechanical degradation and chemical degradation, but the cable becomes bulky and inflexible
Solution Approach 1:
The patent removes the heat shrink protection sleeve from the cable construction, extracting the bulky protective element while maintaining splice protection through alternative means (the strength member integrated into the cable structure and the overcoat layer)
Solution Approach 2:
The strength member is merged with the cable structure itself rather than being a separate protective component. The overcoat layer is integrated into the cable construction, combining multiple functions (protection, structural integrity) into unified elements
2Ease of manufacture
If mass fusion splicing is performed on one-dimensional arrays of optical fibers, then the splicing process is simplified, but the fiber density and cable width are limited
Solution Approach 1:
The patent transitions from one-dimensional linear arrays of optical fibers to two-dimensional planar arrays, allowing multiple fibers to be arranged in rows and columns. This dimensional change enables significantly higher fiber density while maintaining the benefits of mass fusion splicing technology
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 approach reduces the aggregate lateral dimensions of the splices, enhances flexibility, and supports higher fiber density without the use of strength members, addressing the limitations of conventional protection methods and enabling smaller cable widths.
Implementation Method 1
contacting at least a portion of the stripped sections of the fusion spliced optical fibers with polymeric material in a flowable state
Implementation Method 2
solidifying the polymeric material to form a polymeric overcoating
Data Source
Figure 1~2
Figure 3A~4
Figure 5~6
AI summary
A fiber optic cable includes a plurality of fusion spliced optical fibers, with a polymeric overcoating extending over a fusion splice region as well as over a stripped section of each optical fiber proximate to the fusion splice region, wherein the plurality of fusion spliced optical fibers has a non-coplanar arrangement at the fusion splice region. A method for fabricating a fiber optic cable includes fusion splicing first and second pluralities of optical fibers arranged in a respective one-dimensional array to form a plurality of fusion spliced optical fibers, and contacting the fusion splices as well as stripped sections of the fusion spliced optical fibers with polymeric material in a flowable state. Either before or after the contacting step, the method further includes altering a position of at least some of the spliced optical fibers to yield a configuration in which the plurality of fusion spliced optical fibers have a non-coplanar arrangement at the fusion splice region. The method further includes solidifying the polymeric material.