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Sensors (Basel). 2017 Oct 6;17(10). pii: E2278. doi: 10.3390/s17102278.

Application of Negative Curvature Hollow-Core Fiber in an Optical Fiber Sensor Setup for Multiphoton Spectroscopy.

Author information

1
Department of Telecommunications and Teleinformatics, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland. maciej.popenda@pwr.edu.pl.
2
Department of Telecommunications and Teleinformatics, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland. hanna.stawska@pwr.edu.pl.
3
Advanced Materials Engineering and Modelling Group, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland. leszek.mazur@pwr.edu.pl.
4
Advanced Materials Engineering and Modelling Group, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland. kudzu.jakubowski@gmail.com.
5
Fiber Optics Research Center of Russian Academy of Sciences, Moscow 119333, Russia. kaf@fo.gpi.ru.
6
Fiber Optics Research Center of Russian Academy of Sciences, Moscow 119333, Russia. kolyadin@fo.gpi.ru.
7
Department of Telecommunications and Teleinformatics, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland. elzbieta.pawlik@pwr.edu.pl.

Abstract

In this paper, an application of negative curvature hollow core fiber (NCHCF) in an all-fiber, multiphoton fluorescence sensor setup is presented. The dispersion parameter (D) of this fiber does not exceed the value of 5 ps/nm × km across the optical spectrum of (680-750) nm, making it well suited for the purpose of multiphoton excitation of biological fluorophores. Employing 1.5 m of this fiber in a simple, all-fiber sensor setup allows us to perform multiphoton experiments without any dispersion compensation methods. Multiphoton excitation of nicotinamide adenine dinucleotide (NADH) and flavin adenine dinucleotide (FAD) with this fiber shows a 6- and 9-fold increase, respectively, in the total fluorescence signal collected when compared with the commercial solution in the form of a hollow-core photonic band gap fiber (HCPBF). To the author's best knowledge, this is the first time an NCHCF was used in an optical-fiber sensor setup for multiphoton fluorescence experiments.

KEYWORDS:

hollow core fiber; multiphoton fluorescence; negative curvature fiber; photonic crystal fiber sensor

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