Fiber-optic evanescent field absorption sensor

Concepts

Natural SciencesMaterials EngineeringMaterials ScienceOptical MaterialsOpticsSensorsFiber OpticsFiber PropertiesOptical FibersOptical SensingOptical SensorsRefractive IndexEvanescent Field SensingFiber SensorsFiber-optic SensingFiber-optic SensorsOptical Absorption CoefficientOptical Fiber SensorsWaveguide-based Sensors

Abstract

Waveguide evanescent field absorption has been measured as a function of cladding refractive index and bulk absorption coefficient. A simple theory for interpreting these results has been developed. An all-fiber species concentration sensor has been constructed and its performance characterized.

References

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