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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 15 — May. 20, 2002
  • pp: 2879–2887

Optimization of Absorption-Based Optical Chemical Sensors that Employ a Single-Reflection Configuration

Lubos Polerecky, Conor S. Burke, and Brian D. MacCraith  »View Author Affiliations


Applied Optics, Vol. 41, Issue 15, pp. 2879-2887 (2002)
http://dx.doi.org/10.1364/AO.41.002879


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Abstract

An optimization strategy for a generic absorption-based optical chemical sensor that employs a single-reflection planar configuration is reported. A theoretical model describing the sensor sensitivity is presented and verified experimentally. It is shown that optimum sensitivity is not achieved with an evanescent-wave sensing technique but with a configuration in which the interrogating light propagates within the sensing layer. Moreover, an optimization strategy based on identification of an optimized reflection angle is described. This analysis provides an optimization strategy that is extendable to multimode waveguide platforms. The predictions of the model are used in the design of a prototype LED-based sensor system. The performance of this system is examined, and the results are compared with alternative absorption-based sensor configurations.

© 2002 Optical Society of America

OCIS Codes
(130.6010) Integrated optics : Sensors
(160.6060) Materials : Solgel
(220.4830) Optical design and fabrication : Systems design
(310.0310) Thin films : Thin films

Citation
Lubos Polerecky, Conor S. Burke, and Brian D. MacCraith, "Optimization of Absorption-Based Optical Chemical Sensors that Employ a Single-Reflection Configuration," Appl. Opt. 41, 2879-2887 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-15-2879

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