We report on a differential refractometer based on a guided wave that interacts with gaseous or liquid samples, presenting sensitivity better than 10<sup>-5</sup>for changes in the index of refraction.
© 2010 The Optical Society
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(310.0310) Thin films : Thin films
(310.2785) Thin films : Guided wave applications
(280.4788) Remote sensing and sensors : Optical sensing and sensors
R. A. Ribeiro and S. C. Zilio, "High Sensitivity Differential Refractometer by Evanescent Wave in a Thin Dielectric Waveguide," in Latin America Optics and Photonics Conference, OSA Technical Digest (CD) (Optical Society of America, 2010), paper WE19.
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