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Feedback Stabilized Interrogation Technique for EFPI/FBG Hybrid Fiber-Optic Pressure and Temperature Sensors

Feedback Stabilized Interrogation Technique for EFPI/FBG Hybrid Fiber-Optic Pressure and Temperature Sensors,10.1109/JSEN.2011.2140104,IEEE Sensors Jo

Feedback Stabilized Interrogation Technique for EFPI/FBG Hybrid Fiber-Optic Pressure and Temperature Sensors  
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This paper discusses a Single Wavelength Interroga- tion (SWI) technique used to measure fast changing pressure re- lated signals and over a large operational temperature range. The novel technique is based on a fiber-optic pressure and temperature hybrid sensor, and a feedback stabilization technique for a tunable laser source. The fiber-optic hybrid sensor consists of a miniature diaphragm based all-silica Extrinsic Fabry-Perot Interferometric (EFPI) Fiber-Optic Pressure Sensor (FOPS) which additionally in- corporates a Fiber Bragg Grating (FBG) temperature sensor. The FBG temperature sensor is used as a feedback element to stabilize the outputwavelength ofthe tunablelasersource tooperate always in the linear range of the EFPI FOPS.
Journal: IEEE Sensors Journal - IEEE SENS J , vol. 12, no. 1, pp. 133-138, 2012
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