Fiber probe microcavities for refractive index and temperature discrimination

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Date
2016
Authors
Ricardo Melo André
Warren Smith,SC
Becker,M
Dellith,J
Rothhardt,M
Zibaii,MI
Latifi,H
Manuel Joaquim Marques
Bartelt,H
Orlando Frazão
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Abstract
Fiber probe structures composed of two physical microcavities were created using focused ion beam technology. These structures have a tip-like shape as they were milled in preciously etched tapered fiber tips. The microprobes are then characterized for temperature and refractive index sensing using a signal filtering technique to discriminate signals from distinct microcavities. Using fast Fourier transforms combined with band-pass filters, it is possible to reconstruct the spectra of each cavity independently and thus measure their individual spectral shifts.
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