Journal
APPLIED PHYSICS LETTERS
Volume 93, Issue 19, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3025576
Keywords
fibre optic sensors; light interferometers; light reflection; optical fibre cladding; photonic crystals; refractive index; refractive index measurement; voids (solid)
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Funding
- Spanish Ministry of Education and Science [TEC2006-10665/MIC]
- European Commission [FP6-511616]
- Ministerio de Educacion y Ciencia (Spain)
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A compact in reflection modal interferometer consisting of a stub of large-mode area photonic crystal fiber (PCF) spliced to standard fiber is presented. In the splice, the voids of the PCF are fully collapsed allowing so coupling and recombining PCF core and cladding modes. The interferometer is highly stable over time and can be used for different applications. The measuring of refractive index in the 1.33-1.45 range with high sensitivity is demonstrated. Sensing applications based on refractive index changes are also feasible.
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