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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 5, Iss. 1 — Jan. 4, 2010

Theoretical analysis of a fiber optic surface plasmon resonance sensor utilizing a Bragg grating

Barbora Špačková and Jiří Homola  »View Author Affiliations


Optics Express, Vol. 17, Issue 25, pp. 23254-23264 (2009)
http://dx.doi.org/10.1364/OE.17.023254


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Abstract

A rigorous theoretical analysis of a fiber optic surface plasmon resonance sensor is presented. The sensor is based on the spectroscopy of mixed surface plasmon – fiber cladding modes excited by the fundamental mode of an optical fiber via a Bragg grating formed in the fiber core. The transmission spectrum is calculated by means of the Coupled Mode Theory. The modal structure is theoretically analyzed using a 3-D method based on a field expansion approach for matching the field continuity at the boundary of the layers. The theoretical analysis revealed a series of narrow transmission dips associated with the coupling of the fundamental mode to the mixed surface plasmon – fiber cladding modes. The sensitivity of these dips to changes in the refractive index of the analyte is calculated. Moreover, the refractive index resolution of the sensor was estimated to be better than 2 × 10−6 RIU.

© 2009 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(240.6680) Optics at surfaces : Surface plasmons
(280.1415) Remote sensing and sensors : Biological sensing and sensors
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Sensors

History
Original Manuscript: October 27, 2009
Revised Manuscript: November 29, 2009
Manuscript Accepted: November 30, 2009
Published: December 3, 2009

Virtual Issues
Vol. 5, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Barbora Špačková and Jiří Homola, "Theoretical analysis of a fiber optic surface plasmon resonance sensor utilizing a Bragg grating," Opt. Express 17, 23254-23264 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-17-25-23254


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