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Cárdenas-Sevilla, G.A.; Fávero, Fernando C.; Villatoro, Joel (2013)
Publisher: Molecular Diversity Preservation International (MDPI)
Journal: Sensors (Basel, Switzerland)
Languages: English
Types: Article
Subjects: refractive index sensors, TP1-1185, interferometry, photonic crystal fibers, Chemical technology, modal interference, liquid level sensors, Article
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.
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