Fiber Sensors for Physical and Chemical Parameters

Temperature sensors form a large class of commercially available fiber optic sensors. Refraining from the advantage of electromagnetic immimity - the main reason for its use - some of these sensors can easily be embedded in or attached to tiny samples without pertirrbing or heat sinking them. A number of examples can be found in [26,41 8]. 

For measurement of temperature distribution in composite structures, a backscattering-based sensor is used. This method of distributed temperature measurement can also be used for continuous detection of hot-spots along extended lines like high voltage lines and pipelines [49,50]. 

Fiber Optic Sensors for Moisture and Chemical Parameters 

Fiber optic sensors can be made sensitive for monitoring of moisture ingress or chemical species. There are both local sensors and distributed sensors [51- 

There are special sensor designs for local or distributed measurement of corrosion [55,56]. 

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