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Significant retrieval of lost evanescent power by tuning modes close-to-cutoff with a gel-coated taper |
Optics Letters, Vol. 36, Issue 11, pp. 2092-2094 (2011)
http://dx.doi.org/10.1364/OL.36.002092
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Abstract
We report a fiber-optic evanescent-wave (EW) sensor capable of dramatically increasing the power collection level by capturing the EW power that is normally lost. The key element is a taper with a thin overlay that is completely separated from the sample by an arbitrary distance and thus operates remotely within the instrumentation system. A two-stage tuning of the close-to-cutoff modes occurring within this element is proposed to interpret the observed phenomenon.
© 2011 Optical Society of America
OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence
ToC Category:
Fiber Optics and Optical Communications
History
Original Manuscript: April 11, 2011
Manuscript Accepted: April 22, 2011
Published: May 27, 2011
Citation
Huacai Chen, Jianjun Ma, Jiahua Chen, and Wojtek J. Bock, "Significant retrieval of lost evanescent power by tuning modes close-to-cutoff with a gel-coated taper," Opt. Lett. 36, 2092-2094 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-11-2092
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