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Tapered optical fiber tip probes based on focused ion beam-milled Fabry-Perot microcavities

Title
Tapered optical fiber tip probes based on focused ion beam-milled Fabry-Perot microcavities
Type
Article in International Conference Proceedings Book
Year
2016
Authors
Andre, RM
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Warren Smith, SC
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Becker, M
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Dellith, J
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Rothhardt, M
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Zibaii, MI
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Latifi, H
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marques, mb
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Bartelt, H
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Frazao, O
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Conference proceedings International
Conference on Nanoengineering - Fabrication, Properties, Optics, and Devices XIII
San Diego, CA, AUG 30-31, 2016
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Publicação em ISI Web of Knowledge ISI Web of Knowledge - 0 Citations
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Authenticus ID: P-00M-AJT
Abstract (EN): Focused ion beam technology is combined with dynamic chemical etching to create microcavities in tapered optical fiber tips, resulting in fiber probes for temperature and refractive index sensing. Dynamic chemical etching uses hydrofluoric acid and a syringe pump to etch standard optical fibers into cone structures called tapered fiber tips where the length, shape, and cone angle can be precisely controlled. On these tips, focused ion beam is used to mill several different types of Fabry-Perot microcavities. Two main cavity types are initially compared and then combined to form a third, complex cavity structure. In the first case, a gap is milled on the tapered fiber tip which allows the external medium to penetrate the light guiding region and thus presents sensitivity to external refractive index changes. In the second, two slots that function as mirrors are milled on the tip creating a silica cavity that is only sensitive to temperature changes. Finally, both cavities are combined on a single tapered fiber tip, resulting in a multi-cavity structure capable of discriminating between temperature and refractive index variations. This dual characterization is performed with the aid of a fast Fourier transform method to separate the contributions of each cavity and thus of temperature and refractive index. Ultimately, a tapered optical fiber tip probe with sub-standard dimensions containing a multi-cavity structure is projected, fabricated, characterized and applied as a sensing element for simultaneous temperature and refractive index discrimination.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 7
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Simultaneous measurement of temperature and refractive index using focused ion beam milled Fabry-Perot cavities in optical fiber micro-tips (2016)
Article in International Scientific Journal
Andre, RM; Warren Smith, SC; Becker, M; Dellith, J; Rothhardt, M; Zibaii, MI; Latifi, H; marques, mb; Bartelt, H; Frazao, O
Fiber probe microcavities for refractive index and temperature discrimination (2016)
Article in International Conference Proceedings Book
Andre, RM; Warren Smith, SC; Becker, M; Dellith, J; Rothhardt, M; Zibaii, MI; Latifi, H; marques, mb; Bartelt, H; Frazao, O
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