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Electrical and electronic engineering
We propose and experimentally demonstrate an enhanced evanescent field fiber refractometer based on a tapered multimode fiber sandwiched between two single-mode fibers. Experiments show that this fiber sensor offers ultrahigh sensitivity [better than 1900 nm/RIU at a refractive index (RI) of 1.44] for RI measurements within the range of 1.33–1.44 , in agreement with the theoretical predictions. This is the highest value reported to date (to our knowledge) in the literature.
Wang, P., Brambilla, G., Ding, M., Semenova, Y., Wu, Q., Farrell, G.:A High Sensitivity, Evanescent Feld Refractometric Sensor Based on Tapered Multimode Fiber Interference. Optics Letters, Vol. 36, 12, 2011, pp.2233-2235. doi:10.1364/OL.36.002233