High-visibility photonic crystal fiber interferometer as multifunctional sensor

G.A. Cárdenas-Sevilla, Fernando C. Fávero, Joel Villatoro

Research output: Contribution to journalSpecial issuepeer-review


A photonic crystal fiber (PCF) interferometer that exhibits record fringe contrast (~40 dB) is demonstrated along with its sensing applications. The device operates in reflection mode and consists of a centimeter-long segment of properly selected PCF fusion spliced to single mode optical fibers. Two identical collapsed zones in the PCF combined with its modal properties allow high-visibility interference patterns. The interferometer is suitable for refractometric and liquid level sensing. The measuring refractive index range goes from 1.33 to 1.43 and the maximum resolution is ~1.6 × 10-5.

Original languageEnglish
Pages (from-to)2349-2358
Number of pages10
Issue number2
Publication statusPublished - 8 Feb 2013

Bibliographical note

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


  • Interferometry
  • liquid level sensors
  • modal interference
  • photonic crystal fibers
  • refractive index sensors

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