Performance of a highly sensitive optica
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R.G. Heideman; R.P.H. Kooyman; J. Greve
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Article
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1993
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Elsevier Science
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English
⚖ 525 KB
We describe a highly sensitive sensor which uses the evanescent field of a reusable planar optical waveguide as the sensing element . The waveguide used is optimized to obtain a steep dependence of the propagation velocity on the refractive-index profile near the surface, The adsorption of a layer o