Changsen Sun

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A fiber Fabry-Perot (F-P) interferometer and a fiber Bragg grating (FBG) based pressure and temperature multiplexing sensor system is presented. This system is designed for high-temperature oil well down-hole permanent monitoring of pressure and temperature. Connecting a FBG temperature sensor and a F-P pressure sensor in series in the sensor head, the(More)
A differential method is described for an optical fiber photoelastic pressure sensor to implement high sensitivity and low drift optically. The method relies on importing two orthogonal polarization light beams into the system alternately in time to produce two differential output signals that are derived from conventional compensation methods. The(More)
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