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Rego, G.
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Publications (6/6 displayed)
- 2016Arc-Induced Long-Period Fiber Gratings in the Dispersion Turning Pointscitations
- 2010Fibre Optic Hot-Wire Flowmeter Based on a Metallic Coated Hybrid LPG-FBG Structurecitations
- 2009Effect of fiber tapering in LPG-based Mach-Zehnder modal interferometers for refractive-index sensingcitations
- 2009Geometrical effects on the refractive index sensitivity of Mach-Zehnder fibre modal interferometers based on long-period gratingscitations
- 2008Modal LPG-based Mach-Zehnder interferometer with controlled sensitivity for refractive index measurement
- 2005Arc-induced long-period gratings in aluminosilicate glass fiberscitations
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document
Effect of fiber tapering in LPG-based Mach-Zehnder modal interferometers for refractive-index sensing
Abstract
In this work, an LPG-based Mach-Zehnder modal interferometer with a tapered fiber section between the two LPGs is studied as a sensing structure for measuring environmental refractive index. To interrogate this sensing device, coherence addressing and pseudo-heterodyne processing were used. A fiber taper was made between the two LPGs to improve and tailor the sensitivity of the sensor. Experimental results show that the sensitivity to external refractive index increases with the length of the taper and that the sensitivity enhancement is stronger for lower order cladding modes. © 2009 SPIE.