Optical Cable with SZ-Stranded Routable Subunits for Balanced Handling
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Solution Overview
Problem
Optical fiber cables with S-Z stranded subunits experience degradation over time due to asymmetrical forces during extended use and movement, leading to reduced handling performance.
Innovation Solution
The subunits are arranged in complementary configurations with some containing optical fibers with a left-hand helical twist and others with a right-hand helical twist, and are S-Z stranded around a central elongate member, with alternating rotational directions to counteract these forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If subunits are S-Z stranded in a conventional configuration, then the cable can be manufactured and installed, but the cable experiences degradation over time due to asymmetrical forces during extended use and movement
Solution Approach 1:
The patent applies asymmetry by configuring subunits with different stranding directions (S-Z pattern) and different numbers of subunits in different layers (e.g., 6 subunits in inner layer, 3 subunits in outer layer). This asymmetric configuration creates balanced asymmetrical forces that counteract each other during cable movement and bending, preventing the degradation that occurs in conventional symmetric configurations.
2Reliability
If subunits are arranged in complementary configurations with alternating rotational directions, then mechanical stability and handling performance are enhanced, but the device complexity increases
Solution Approach 1:
The patent segments the cable structure into multiple subunits that are stranded in different layers with different configurations. The inner layer contains a first set of subunits (e.g., 6 subunits) and the outer layer contains a second set of subunits (e.g., 3 subunits), with alternating S-Z stranding patterns. This segmentation allows each subunit to be optimized independently while contributing to the overall mechanical stability of the cable.
Data Source
AI summary
An optical fiber cable that includes subunits is provided. Optical fiber cables are used to transmit data over distance. The subunits are twisted and stranded within the cable to reduce degradation of stranding during use of the cable. The subunits of one or more optical fiber cables are arranged in complimentary configurations that counteract their varying asymmetrical forces to provide an improved handling performance for the optical fiber cable.