Buffer-Free Optical Fiber Cable Termination
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Solution Overview
Problem
Conventional optical fibers require cumbersome field termination processes involving stripping and cleaning, which can be time-consuming and potentially damaging.
Innovation Solution
A buffer-free optical fiber cable with a thin protective coating, allowing for field termination without stripping, using a glass core, cladding layer, and a jacket that includes a tensile strength member, enabling cleaving and connection to a fiber connector without prior cleansing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a buffer layer is added to protect the optical fiber, then the fiber is more protected during handling and installation, but the field termination process becomes more complex requiring stripping and cleaning steps
Solution Approach 1:
The patent removes the buffer layer from the optical fiber structure, extracting the protective function and replacing it with a different approach. The buffer-free fiber design eliminates the need for stripping operations during field termination, directly resolving the contradiction between protection and ease of operation.
Solution Approach 2:
Instead of adding a buffer layer to achieve protection (conventional approach), the patent inverts the approach by removing the buffer layer entirely and relying on the strength members and cable structure for protection. This inversion simplifies the termination process while maintaining fiber protection through alternative means.
2Ease of operation
If a buffer layer is stripped during field termination, then the fiber can be connected to connectors, but the process becomes time-consuming and potentially damaging to the fiber
Solution Approach 1:
The patent extracts and eliminates the buffer layer that causes the time-consuming stripping process. By designing the fiber without a buffer layer, the termination process is simplified to only require cleaving and connector attachment, dramatically reducing termination time and eliminating potential damage from stripping operations.
3Reliability
If a buffer layer is present on the optical fiber, then the fiber is protected during cable manufacturing and installation, but additional cleaning steps are required during field termination to remove debris
Solution Approach 1:
The patent removes the buffer layer that necessitates cleaning steps during termination. The buffer-free design eliminates the source of debris and the need for cleaning solvents and procedures, reducing the overall complexity of the termination process while maintaining fiber protection through the cable structure and strength members.
4Volume of moving object
If the protective coating on the optical fiber is made thinner, then the outer diameter is reduced to 125 microns or less, but the fiber may be more vulnerable to damage during handling
Solution Approach 1:
The patent uses composite material structures, combining the thin-coated fiber with strength members such as aramid yarn or fiberglass rods. This composite approach allows the fiber to maintain a small outer diameter while the strength members provide the necessary mechanical protection and tensile strength during handling and installation.
Solution Approach 2:
The patent shifts the protection function from the fiber coating itself (one-dimensional solution) to the cable structure as a whole (multi-dimensional solution). The strength members and cable construction provide mechanical strength in dimensions external to the fiber, allowing the fiber coating to remain thin while maintaining overall system reliability.
Data Source
AI summary
Cables having non-stripping, or buffer-free, optical fibers are disclosed. The cables each have a buffer-free optical fiber including a core, cladding layer and a thin protective coating enclosing the cladding and having an overall diameter of 125 μm. This protective coating protects the cladding and core from moisture and provides structural integrity to prevent physical damage to the fiber during installation and termination with connectors. Embodiments of this non-stripping fiber do not require removal of a buffer layer during field termination so connections can be formed using simple cleaving techniques. As such, the field termination process for embodiments is simplified compared with conventional approaches.