The glass fibre inside the cord is untouched by the heating process, as it can only be affected by much higher temperatures. Optical fiber's ability to withstand extreme heat and cold directly impacts signal integrity, network reliability, and maintenance costs, especially in harsh environments like industrial facilities, outdoor installations, and data centers. At significantly higher temperatures, PVC cables can no longer keep up and cables with other sheath materials are required. Depending on the temperature range, manufacturers use polyolefin copolymer, fluoroethylene propylene, polytetrafluorethylene as well as silicone, which is also found in baking. High temperature cables (also known as High Temp cables) represent a vast range of cables which continue to perform at increased and elevated temperatures. These changes can induce microbending and macrobending, where the fiber subtly or significantly bends, respectively.
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