Please use this identifier to cite or link to this item: http://repositorio.inesctec.pt/handle/123456789/7361
Title: Sensing with ultra-short Fabry-Perot cavities written into optical micro-fibers
Authors: Warren Smith,SC
Ricardo Melo André
Dellith,J
Eschrich,T
Becker,M
Bartelt,H
Issue Date: 2017
Abstract: The small dimensions of optical fiber sensors are of particular interest to biological applications, given the ability to penetrate relatively inaccessible regions. However, conventional optical fibers are larger than biological material such as cells, and thus there is a need to further miniaturize fiber sensors. Here we present the fabrication of ultra-small Fabry-Perot cavities written into optical micro-fibers using focused ion beam milling. We have fabricated cavities as small as 2.8 pm and demonstrated their use for sensing of both bulk refractive index and thin-layer coatings. In order to achieve sensitive measurements we interrogate at visible wavelengths with a broadband detection system, thereby reducing the free spectral range of the interferometer relative to the measurement bandwidth, increasing the number of interference fringes, and allowing for the implementation of the Fourier shift method.
URI: http://repositorio.inesctec.pt/handle/123456789/7361
http://dx.doi.org/10.1016/j.snb.2017.01.081
metadata.dc.type: article
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Appears in Collections:Non INESC TEC publications - Articles in International Journals

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