Soft buffer layers have been found greatly to improve optical-fiber cable performance1-4 by reducing the microbending loss produced in the fiber by external perturbations or by cable irregularities. A side view of a typical soft buffered cable is shown in Fig. 1. The fiber is surrounded by a soft silicone layer, which is covered by a tightly adhering hard jacket, typically Hytrel or nylon. At low temperatures.
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