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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 67, Iss. 12 — Dec. 1, 2013
  • pp: 1479–1484

Characterization of Liquid-Core/Liquid-Cladding Optical Waveguides of a Sodium Chloride Solution/Water System by Computational Fluid Dynamics

Junya Kamiyama, Soto Asanuma, Hiroyasu Murata, Yasuhiko Sugii, Hiroki Hotta, Kiichi Sato, and Kin-ichi Tsunoda

Applied Spectroscopy, Vol. 67, Issue 12, pp. 1479-1484 (2013)


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Abstract

A stable liquid/liquid optical waveguide (LLW) was formed using a sheath flow, where a 15% sodium chloride (NaCl) solution functioned as the core solution and water functioned as the cladding solution (15% NaCl/water LLW). The LLW was at least 200 mm in length. The concentration distributions of the liquid core and liquid cladding solutions in the LLW system were predicted by computational fluid dynamics (CFD) to validate the characteristics of the waveguide. The broadening of the region of the fluorescence of Rhodamine B excited by the guided light and the increase in the critical angle of the guided light with the increase in the contact time of the core and the cladding solutions were well explained by CFD calculations. However, no substantial leakage of the guided light was observed despite the considerably large change in the refractive index profile of the LLW; thus, a narrower and longer waveguide was realized.

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Citation
Junya Kamiyama, Soto Asanuma, Hiroyasu Murata, Yasuhiko Sugii, Hiroki Hotta, Kiichi Sato, and Kin-ichi Tsunoda, "Characterization of Liquid-Core/Liquid-Cladding Optical Waveguides of a Sodium Chloride Solution/Water System by Computational Fluid Dynamics," Appl. Spectrosc. 67, 1479-1484 (2013)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-67-12-1479

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