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Proceedings Paper

Surface plasmon resonance based multi-channel and multi-analyte fiber optic sensor
Author(s): Roli Verma; Sachin K. Srivastava; Banshi D. Gupta
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Paper Abstract

Surface plasmon resonance (SPR) based fiber optic sensor has been studied for multichannel and multianalyte sensing. Simulations have been carried out for a fiber optic sensor having two sensing regions coated with silver and gold for multichannel and multianalyte sensing. The simulated results have been obtained for different combinations of refractive indices of the samples around the probes. To support simulations optical fiber SPR probes with two sensing regions coated with silver and gold have been fabricated. SPR spectra for these sensors have been recorded for aqueous sucrose solutions of varying refractive indices. The refractive index of the liquid samples around both the gold and silver coated regions was kept the same to see the potential of SPR based fiber optic multichannel sensing, while it was kept different for studies related to multianalyte sensing. Both the theoretical and experimental results match qualitatively. The SPR resonance wavelengths for gold and silver being different, these sensors can be utilized for both multichannel and multianalyte sensing.

Paper Details

Date Published: 30 January 2012
PDF: 8 pages
Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 83512D (30 January 2012); doi: 10.1117/12.914781
Show Author Affiliations
Roli Verma, Indian Institute of Technology Delhi (India)
Sachin K. Srivastava, Indian Institute of Technology Delhi (India)
Banshi D. Gupta, Indian Institute of Technology Delhi (India)


Published in SPIE Proceedings Vol. 8351:
Third Asia Pacific Optical Sensors Conference
John Canning; Gangding Peng, Editor(s)

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