Fiber - Optic Sensing of Linear Thermal Expansion (RESEARCH NOTES)

The use of a LED fiber-optic sensor to measure displacement and linear thermal expansion is described. It has a sensitivity of about ۰.۶ mV/mm, a resolution of ۱.۲۵ mm, and a dynamic rang of ۴۰۰ mm for displacement measurements. For thermal expansion, it shows a sensitivity of about ۳.۵ mV/C, and the experimental linear expansion values are in agreement with those calculated. The reported sensor offers the advantage of simplicity, reliability, high sensitivity, and a wide dynamic range with a minimum cost.

Keywords:

Fiber , optic , Sensor , Displacement , Linear Thermal Expansion