IEEE Journal of Selected Topics in Quantum Electronics · 2011 · 40 citations · 12 references
EngineeringBioengineeringBiomedical EngineeringBiomedical OpticsBiosensorsPhotonicsFiber OpticsOptical BiosensingOptical BiosensorsOptical FibersOptical SensingRefractive IndexFiber Optic BiosensorsInterferometric BiosensingInterferometric BiosensorsOptical DetectionPhotonic Crystal FibersRefractive Index SensingSingle-mode FibersSingle-mode Optical Fibers
We report the fabrication of a highly sensitive refractometer based on photonic crystal fiber (PCF) interferometry. Using fusion arc splicing technique, a short length of PCF (∼3 mm) was spliced to conventional single-mode fibers on both sides. The voids of the PCF were completely collapsed in the splice region, which acted as mode splitter and combiner on both sides. Microbubbles were formed in the splice region and acted as diverging lens for exciting cladding modes efficiently. The transmission spectrum exhibited detectable “dips” for refractive index (RI) sensing. The bulk liquid sensitivity can reach up to 320 nm/RIU (RI unit) based on the linear curve fit for RI ranging from 1.33 to 1.34. Biosensing experiment was carried out using streptavidin and biotin as respective analyte and receptor. To the best of authors’ knowledge, this is the first time of reporting bioaffinity test on the external surface of PCF using modal interferometry.
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Refractometry based on a photonic crystal fiber interferometer
Rajan Jha, Joel Villatoro, G. Badenes et al. · Optics Letters · 2009 · 236 citations
Natural Sciences, Electrical Engineering, Materials Science +17
Photonic crystal fiber interferometer for chemical vapor detection with high sensitivity
Joel Villatoro, Mark P. Kreuzer, Rajan Jha et al. · Optics Express · 2009 · 136 citations · Full text