How to extend the service life of fiber optic cable?

I. How to extend the life of fiber optic cable? A fiber optic cable is a communication cable consisting of two or more glass or plastic fiber optic cores that are located within a protective cladding covered by a plastic PVC outer sleeve. Signal transmission along the internal fibers generally uses infrared light.1 When the fatigue parameter n is certain, the life ts of the fiber is only related to the stresses σ that it is exposed to, so reducing the stresses that the fiber is exposed to is one way to increase the life of the fiber. When people manufacture optical fibers, a compressive stress is formed on the surface of the fiber to counteract the tensile stress, so that the tensile stress is reduced to the smallest possible extent, which gives rise to the compressive stress cladding technology to manufacture optical fibers. If the fiber is subjected to the stress of σa, the life of t1, when the fiber has a compressive stress σR cladding, the life of the fiber is t2: t2 = t1 [(σa - σR) / σa] - n, where (σa - σR) for the fiber is really subjected to the net stress. This shows that an optical fiber with a compressive stress cladding has a much longer lifetime than a normal optical fiber.2 The static fatigue parameter n of the optical fiber is improved to increase the lifetime of the optical fiber. Therefore, people in the manufacture of optical fibers, try to isolate the quartz fiber itself from the atmosphere, so that it is not affected by the atmosphere, as far as possible, the value of n from the environmental material parameters into the parameters of the fiber material itself, you can make the value of n becomes very large, which gives rise to the "sealing cladding technology" on the surface of the optical fiber.

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