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  • Vol. 28, Iss. 21 — Nov. 1, 2003
  • pp: 2037–2039

Distributed three-dimensional fiber Bragg grating refractometer for biochemical sensing

S. Keren and M. Horowitz  »View Author Affiliations


Optics Letters, Vol. 28, Issue 21, pp. 2037-2039 (2003)
http://dx.doi.org/10.1364/OL.28.002037


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Abstract

We demonstrate a three-dimensional (3-D) distributed refractometer that measures refractive index in a small volume. The sensor is based on an evanescent-wave fiber Bragg grating that is interrogated by low-coherence spectral interferometry. The measurement can be performed on a short time scale without the need for a mechanical scan. The new sensor was used to simultaneously measure glucose concentration in several droplets along a single sensor and to interrogate the time-dependent evaporation process of a water droplet. The new measurement technique might enable novel 3-D distributed sensors to be developed and multiple discrete measurements to be made in a small volume.

© 2003 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(290.3030) Scattering : Index measurements

Citation
S. Keren and M. Horowitz, "Distributed three-dimensional fiber Bragg grating refractometer for biochemical sensing," Opt. Lett. 28, 2037-2039 (2003)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-28-21-2037


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