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Proceedings Paper

Comparison of robust coupling techniques for planar waveguide immunosensors
Author(s): Douglas A. Christensen; Shellee Dyer; James N. Herron; Vladimir Hlady
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Paper Abstract

We have analyzed and fabricated two different coupling schemes to meet the requirements for a convenient means of coupling into a planar waveguide immunosensor that is relatively insensitive to beam alignment. These are the `launch' coupler and the grating coupler. Each possesses advantages and disadvantages, depending mainly on the thickness (mode number) of the waveguide to be illuminated. For example, the launch coupler is best suited to a thick (highly multimode) waveguide and is less efficient for a thin (few mode) guide. Our experimental results verify predictions of a ray theory developed to give coupling efficiency for a variety of coupling parameters.

Paper Details

Date Published: 30 April 1993
PDF: 6 pages
Proc. SPIE 1796, Chemical, Biochemical, and Environmental Fiber Sensors IV, (30 April 1993); doi: 10.1117/12.143532
Show Author Affiliations
Douglas A. Christensen, Univ. of Utah (United States)
Shellee Dyer, Univ. of Utah (United States)
James N. Herron, Univ. of Utah (United States)
Vladimir Hlady, Univ. of Utah (United States)


Published in SPIE Proceedings Vol. 1796:
Chemical, Biochemical, and Environmental Fiber Sensors IV
Robert A. Lieberman, Editor(s)

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