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In telecommunication, a plastic-clad silica fiber (PCS) is an optical fiber that has a silica-based core and a plastic cladding.
Note 1: The cladding of a PCS fiber should not be confused with the polymer overcoat of a conventional all-glass fiber.
Note 2: PCS fibers in general have significantly lower performance characteristics, i.e., higher transmission losses and lower bandwidths, than all-glass fibers. Synonym polymer-clad silica fiber.
Source: from Federal Standard 1037C
