Simultaneous measurement of temperature and pressure with cascaded extrinsic Fabry–Perot interferometer and intrinsic Fabry–Perot interferometer sensors

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Abstract
Pressure and temperature are two important parameters in the well and reservoir down-hole monitoring. Accurate, continuous, and real-time data of pressure and temperature helps in oil and reservoir management.1 Sensors with dual-parameter sensing capability and survivability in the down-hole harsh environment are highly necessary in such applications. Fiber-optic sensors, with advantages such as small size, low loss, high sensitivity, resistance to harsh environments, and multiplexing capability, are good candidates for pressure and temperature down-hole monitoring.

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