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Tight Buffer
Tight Buffered Fiber
A thermoplastic material is extruded directly over the acrylate coating, increasing the outside diameter of the fiber to 900 micron (0.9 mm), an industry
standard. The tight buffer supplies the fiber with added mechanical and environmental protection, increased size for easy handling, and a simple means of adding color coding for fiber identification. During connectorization, the buffer is stripped back to an exact length as required by the connector manufacturer.
Loose Tube
Loose Buffered Fiber
In loose tube cables, the coated fiber "floats" within a rugged, abrasion resistant, oversized tube which is filled with optical gel. Since the tube does not have direct contact with the fiber, any cable material expansion or contraction will not cause stress on the fiber. Much of the external stress placed on the tube also will not be transferred to the fiber. The non-hygroscopic gel prevents water from entering the tube.
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