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Multi-parameter sensor using fiber in-line MZ interferometer embedded in fiber Bragg grating

By C Liao, Y Wang, D Wang and M Yang


Fourth European Workshop on Optical Fibre Sensors, Portugal, 8-10 September 2010We propose an ultra compact optical fiber sensor integrating a Mach-Zehnder interferometer (MZI) in fiber Bragg grating (FBG) for simultaneous refractive index (RI) and temperature measurement. By use of the resonant wavelength of the FBG and the interference dip of the MZI, the RI and temperature of the surrounding medium can be unambiguously determined. The interesting properties of the sensor include good operation linearity, extremely high RI sensitivity up to ~9148 nm/RIU (RI unit) in the RI range between 1.30 and 1.325 and precise sensing location, determined by the MZI cavity created.Department of Electrical EngineeringRefereed conference pape

Topics: Fiber Bragg gratings, Interferometers, Sensors, Mach-Zehnder interferometer, Refractive index, Fiber optics sensors
Publisher: SPIE-International Society for Optical Engineering
Year: 2010
DOI identifier: 10.1117/12.865566
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