The new fiber-optic stain sensor

In this paper, we introduced a new fiber-optic strain sensor with white light interferometric principle based on Fabry-Perot, which is capable of providing measurement for the building strain. The signal processing of system is that the optical signal wavelength is modulated in the Fabry-Perot cavity and is demodulated during the optical-electricity transform. Compared with a common optical fiber strain sensor, it has more advantages, such as low cost, high stability, and high anti-interference. The resolution of the fiber-optic strain sensor is up to 1mu epsiv within the test range being plusmn 5000 mu epsiv .The fiber-optic strain sensor system made up of this fiber-optic strain sensor is put into use in many fields for monitoring in real time and intelligent evaluating.