Abstract
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 1900nm=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.
| Original language | English |
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| Pages (from-to) | 2233-2235 |
| Number of pages | 3 |
| Journal | Optics Letters |
| Volume | 36 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 15 Jun 2011 |