IEEE Sensors Journal · 2012 · 53 citations · 21 references
Optical MaterialsEngineeringClear Interference SpectrumOptical TestingInterferometryOptical MetrologyFiber OpticsSandwich Fiber StructureNovel Refractive-indexOptical PropertiesOptical SensorInstrumentationOptical SystemsReflectanceMultimode FiberPhotonicsRefractive Index MeasurementFiber Optic SensingOptical MeasurementFiber OpticOptical ComponentsOptical SensorsOptical WaveguidesOptical System AnalysisMach–zehnder Interferometer
A novel refractive-index (RI) sensor based on Mach-Zehnder interferometer composed of an uncoated single-mode fiber section sandwiched between two short sections of multimode fiber is proposed and experimentally demonstrated. A clear interference spectrum is obtained and the dip wavelength shifts as a function of surrounding RI. An estimated resolution of 7.1 × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-5</sup> within the linear sensing range from 1.33 to 1.40 and a maximum up to 6.4 × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-6</sup> at indexes around 1.44 have been achieved for the cost-effective RI measurement.
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High temperature fiber sensor with high sensitivity based on core diameter mismatch
Linh V. Nguyen, Dusun Hwang, Sucbei Moon et al. · Optics Express · 2008 · 408 citations · Full text