Fiber Optic Cable Clamp for Thermal Contraction Management
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Solution Overview
Problem
Multifiber optical cables experience signal loss due to temperature extremes, as the protective sheath contracts and exerts compression forces on optical fibers, forming microbends, when exposed to environmental conditions.
Innovation Solution
A fiber optic cable clamp that maintains the relative axial locations of the protective sheath and strength member by using a sheath grip member and a strength member clamp, integrated with a cable fiber separator, which includes openings for furcation tubes to prevent axial movement and signal loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the protective sheath is made from plastic material, then the cable is protected and easy to manufacture, but the sheath expands and contracts at a higher rate than fibers or strength member, causing microbends and signal loss at low temperatures
Solution Approach 1:
The clamp is divided into distinct functional segments: a sheath grip portion that engages the protective sheath and a strength member clamp portion that engages the strength member. These segments are maintained at a constant axial distance from each other, allowing independent engagement with components that have different thermal expansion rates, thereby preventing microbends while maintaining manufacturing simplicity.
2Stability of the object's composition
If the protective sheath contracts at low temperatures, then the cable structure is maintained, but compression force is exerted on optical strands forming microbends, resulting in signal loss
Solution Approach 1:
The clamp acts as an intermediary device between the protective sheath and the strength member. By engaging both components and maintaining their relative axial positions, the clamp mediates the differential thermal contraction, preventing the sheath from exerting direct compression force on the optical strands while the cable structure remains stable.
3Adaptability or versatility
If the strength member and protective sheath are allowed to move independently, then each component can accommodate thermal expansion, but the relative axial positions change, causing misalignment and potential damage
Solution Approach 1:
The clamp provides a dynamic solution by allowing the sheath grip portion and strength member clamp portion to independently engage with components that move at different rates during thermal expansion and contraction. The constant axial distance constraint between the portions maintains stability while accommodating the dynamic thermal behavior of each component.
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 clamp effectively maintains the positional relationship between the sheath and strength member, preventing signal loss across a wide range of temperatures by gripping the sheath and clamping the strength member, thus stabilizing the optical fibers.
Implementation Method 1
At low temperatures, the protective sheath surrounding the optical fibers contracts, exerting a compression force on the optical strands.
Data Source
AI summary
A fiber optic cable clamp is provided. The fiber optic cable clamp includes a sheath grip member and a strength member clamp maintained at a constant axial location with respect to the sheath grip member. The fiber optic cable clamp also includes a cable fiber separator connected to the sheath grip member, the cable fiber separator including a plurality of cable fiber openings and attached to the strength member clamp. The fiber optic cable clamp, when mounted to a fiber optic cable, maintains the relative axial locations of a cable sheath and cable strength member along a fiber optic cable.