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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 21 — Jul. 20, 2007
  • pp: 4563–4569

Influence of skew rays on the sensitivity and signal-to-noise ratio of a fiber-optic surface-plasmon-resonance sensor: a theoretical study

Yogendra S. Dwivedi, Anuj K. Sharma, and Banshi D. Gupta  »View Author Affiliations


Applied Optics, Vol. 46, Issue 21, pp. 4563-4569 (2007)
http://dx.doi.org/10.1364/AO.46.004563


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Abstract

We have theoretically analyzed the influence of skew rays on the performance of a fiber-optic sensor based on surface plasmon resonance. The performance of the sensor has been evaluated in terms of its sensitivity and signal-to-noise ratio (SNR). The theoretical model for skewness dependence includes the material dispersion in fiber cores and metal layers, simultaneous excitation of skew rays, and meridional rays in the fiber core along with all guided rays launching from a collimated light source. The effect of skew rays on the SNR and the sensitivity of the sensor with two different metals has been compared. The same comparison is carried out for the different values of design parameters such as numerical aperture, fiber core diameter, and the length of the surface-plasmon-resonance (SPR) active sensing region. This detailed analysis for the effect of skewness on the SNR and the sensitivity of the sensor leads us to achieve the best possible performance from a fiber-optic SPR sensor against the skewness in the optical fiber.

© 2007 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.6810) Instrumentation, measurement, and metrology : Thermal effects

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: January 8, 2007
Revised Manuscript: March 16, 2007
Manuscript Accepted: March 22, 2007
Published: July 6, 2007

Citation
Yogendra S. Dwivedi, Anuj K. Sharma, and Banshi D. Gupta, "Influence of skew rays on the sensitivity and signal-to-noise ratio of a fiber-optic surface-plasmon-resonance sensor: a theoretical study," Appl. Opt. 46, 4563-4569 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-21-4563

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