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Highly-sensitive passive integrated optical spiral-shaped waveguide refractometer

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2 Author(s)
Veldhuis, G.J. ; MESA Research Institute, University of Twente, 7500 AE Enschede, The Netherlands ; Lambeck, P.V.

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A passive integrated optical waveguide refractometer based on bendloss changes in a spiral-shaped channel waveguide is proposed and fabricated in Si3N4/SiO2 technology. The experimentally determined performance and the theoretical predictions, based on a simple model for so-called “whispering gallery modes,” agree very well. The minimum detectable refractive index change was measured to be Δn=1.3×10-5. © 1997 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:71 ,  Issue: 20 )

Date of Publication:

Nov 1997

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