High-sensitivity photonic crystal fiber interferometer for chemical vapors detection

Joel Villatoro; Mark P. Kreuzer; Rajan Jha; Vladimir P. Minkovich; Vittoria Finazzi; Gonçal Badenes; Valerio Pruneri

doi:10.1117/12.818265

27 April 2009 High-sensitivity photonic crystal fiber interferometer for chemical vapors detection

Joel Villatoro, Mark P. Kreuzer, Rajan Jha, Vladimir P. Minkovich, Vittoria Finazzi, Gonçal Badenes, Valerio Pruneri

Proceedings Volume 7316, Fiber Optic Sensors and Applications VI; 73161A (2009) https://doi.org/10.1117/12.818265
Event: SPIE Defense, Security, and Sensing, 2009, Orlando, Florida, United States

Abstract

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 very regular 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 around 500 picoliters whereas the detectable levels are in the nanomole range.

Citation Download Citation

Joel Villatoro, Mark P. Kreuzer, Rajan Jha, Vladimir P. Minkovich, Vittoria Finazzi, Gonçal Badenes, and Valerio Pruneri "High-sensitivity photonic crystal fiber interferometer for chemical vapors detection", Proc. SPIE 7316, Fiber Optic Sensors and Applications VI, 73161A (27 April 2009); https://doi.org/10.1117/12.818265

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