期刊
OPTICS EXPRESS
卷 17, 期 3, 页码 1447-1453出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.17.001447
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资金
- Spanish MEC [TEC2006-10665/MIC]
- Ramon y Cajal program
- European Commission through the European Network of Excellence PHOREMOST [FP6-511616]
- ICREA Funding Source: Custom
We report an in-reflection photonic crystal fiber (PCF) interferometer which exhibits high sensitivity to different volatile organic compounds (VOCs), without the need of any permeable material. The interferometer is compact, robust, and consists of a stub of PCF spliced to standard optical fiber. In the splice the voids of the PCF are fully collapsed, thus allowing the excitation and recombination of two core modes. The device reflection spectrum exhibits sinusoidal interference pattern which shifts differently when the voids of the PCF are infiltrated with VOC molecules. The volume of voids responsible for the shift is less than 600 picoliters whereas the detectable levels are in the nanomole range. (C) 2009 Optical Society of America
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