What is the high temperature rating of the reinforcing core? Detailed explanation of different materials.

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9th February 2026

Generally, various reinforcing materials are used in the reinforcing core of optical cables, with stainless steel wire and FRP being the most common.

The stainless steel wire used in optical cables and fiber optic sensors is mainly phosphated steel wire and galvanized steel wire. While these two materials can withstand general high temperatures, optical cables using these materials are usually not high-temperature cables and are mostly buried cables.

FRP is also commonly used as a reinforcing core in optical cables. FRP is mainly composed of glass fiber and polymer adhesive. While the glass fiber is present, the polymer adhesive is not. Therefore, FRP material is generally not high-temperature resistant, but it can withstand medium to low temperatures of approximately 150 degrees Celsius.

Metal reinforcing core of optical fiber2

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What is the high temperature rating of the reinforcing core? Detailed explanation of different materials.

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