Vernier Effect based Strain Sensor with Cascaded Fabry-Perot Interferometers
Lashari Ghulam Abbas
Abstract
Highly sensitive cascaded FPI based strain sensor with Vernier Effect is proposed and experimentally demonstrated. This FPI structure is fabricated by simple and cost-effective techniques such as, cleaving, splicing and tapering. Experimental results show that the proposed structure can provide a high strain sensitivity of 37.3 pm/με, that is 13.3 times higher than the sensitivity of the single sensing FPI, which is 2.8 pm/με. Proposed sensor also exhibits very low temperature cross sensitivity of 0.7 pm/C°. This design can provide simple fabrication, stable and linear output response over a large range of applied strain and brings numerous prospects for sensing applications.
Topics & Concepts
TaperingSensitivity (control systems)Materials scienceAstronomical interferometerFabricationStrain (injury)Vernier scaleFabry–Pérot interferometerInterferometryOpticsOptoelectronicsElectronic engineeringComputer sciencePhysicsEngineeringAlternative medicineComputer graphics (images)Internal medicineMedicineWavelengthPathologyAdvanced Fiber Optic SensorsAdvanced MEMS and NEMS TechnologiesMechanical and Optical Resonators