The function of wall-mounted fiber optic sensors

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Optical fibers can be used as sensors to measure, , and other quantities by modifying a fiber so that the quantity to be measured modulates the, ,or transit time of light in the fiber. Sensors that vary the intensity of light are the simplest, since only a simple source and detector are required. The fiber used is designed such that the Faraday and Kerr effects cause considerable phase change in the presence of the external field. The optical fiber consists of the core and the cladding, which have different refractive indexes. They can detect very small objects, are particularly flexible to mount and are extremely resistant in harsh environments – even in high temperatures.

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