Quantitative broadband chemical sensing in air-suspended solid-core fibers

Euser T, Chen JSY, Scharrer M, Russell PSJ, Farrer NJ, Sadler PJ (2008)

Publication Type: Journal article

Publication year: 2008

Journal

Journal of Applied Physics AIP Publishing

Book Volume: 103

Article Number: 103108

Journal Issue: 10

DOI: 10.1063/1.2924408

Abstract

We demonstrate a quantitative broadband fiber sensor based on evanescent-field sensing in the cladding holes of an air-suspended solid-core photonic crystal fiber. We discuss the fabrication process, together with the structural and optical characterization of a range of different fibers. Measured mode profiles are in good agreement with finite element method calculations made without free parameters. The fraction of the light in the hollow cladding can be tuned via the core diameter of the fiber. Dispersion measurements are in excellent agreement with theory and demonstrate tuning of the zero dispersion wavelength via the core diameter. Optimum design parameters for absorption sensors are discussed using a general parameter diagram. From our analysis, we estimate that a sensitivity increase of three orders of magnitude is feasible compared to standard cuvette measurements. Our study applies to both liquid and gas fiber sensors. We demonstrate the applicability of our results to liquid chemical sensing by measuring the broad absorption peak of an aqueous NiCl2 solution. We find excellent agreement with the reference spectrum measured in a standard cuvette, even though the sample volume has decreased by three orders of magnitude. Our results demonstrate that air-suspended solid-core photonic crystal fibers can be used in quantitative broadband chemical-sensing measurements.

Authors with CRIS profile

Tijmen Euser Institut für Optik, Information und Photonik Michael Scharrer Lehrstuhl für Experimentalphysik (Alfried Krupp von Bohlen und Halbach-Professur) Philip St. John Russell Lehrstuhl für Experimentalphysik (Alfried Krupp von Bohlen und Halbach-Professur)

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials

Involved external institutions

University of Warwick GB United Kingdom (GB)

How to cite

APA:

Euser, T., Chen, J.S.Y., Scharrer, M., Russell, P.S.J., Farrer, N.J., & Sadler, P.J. (2008). Quantitative broadband chemical sensing in air-suspended solid-core fibers. Journal of Applied Physics, 103(10). https://dx.doi.org/10.1063/1.2924408

MLA:

Euser, Tijmen, et al. "Quantitative broadband chemical sensing in air-suspended solid-core fibers." Journal of Applied Physics 103.10 (2008).

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