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Optics Letters

Optics Letters

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  • Vol. 30, Iss. 3 — Feb. 1, 2005
  • pp: 233–235

D-type fiber biosensor based on surface-plasmon resonance technology and heterodyne interferometry

Ming-Hung Chiu, Shinn-Fwu Wang, and Rong-Seng Chang  »View Author Affiliations


Optics Letters, Vol. 30, Issue 3, pp. 233-235 (2005)
http://dx.doi.org/10.1364/OL.30.000233


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Abstract

A D-type fiber biosensor based on surface-plasmon resonance (SPR) technology and heterodyne interferometry is presented. The sensing device is a single-mode optical fiber in which half the core is polished away and a thin-film layer of gold is deposited. We measure the phase-difference variations instead of the light intensity as in traditional SPR techniques. Therefore the accuracy and resolution of our method are very high. Its sensitivity can reach 2×10^-6 refractive-index units. The sensor has some merits, e.g., tunable high sensitivity, small size, lower cost, smaller sample volume, and suitability for in vivo testing. This novel method of a D-type fiber biosensor based on SPR technology and heterodyne interferometry is valuable for chemical, biological, and biochemical sensing, and the novel method of D-type fiber biosensing is a feasible means of study.

© 2005 Optical Society of America

OCIS Codes
(040.2840) Detectors : Heterodyne
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(240.6680) Optics at surfaces : Surface plasmons

Citation
Ming-Hung Chiu, Shinn-Fwu Wang, and Rong-Seng Chang, "D-type fiber biosensor based on surface-plasmon resonance technology and heterodyne interferometry," Opt. Lett. 30, 233-235 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-3-233

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