This paper reviews the sensing principle, structural design, and temperature measurement performance of fiber-optic high-temperature sensors, as well as recent significant progress in the transition of sensing solutions from glass to crystal fiber. These features ensure the cables can withstand: These qualities make them reliable in industries like oil fields, power plants, aerospace, and marine settings, where other. This type of fiber has been used extensively in the oil and gas industry to provide important communications and sensing functions for reservoir management. For temperatures above 300°C, metal coatings would be attractive. Corning's High Temperature Fibers are designed for applications requiring improved fatigue resistance, high usable strength, and excellent resistance to higher temperatures and hydrogen permeation.
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