Analytical Sciences

Abstract − Analytical Sciences, 35(2), 215 (2019).

A Liquid-core Liquid-cladding Optical Waveguide Based on Thermal Gradients across the Laminar Flow of Water in Capillary Tubing
Manami NAKAMURA, Hiroyasu MURATA, Kiichi SATO, and Kin-ichi TSUNODA
Department of Chemistry and Chemical Biology, Gunma University, Tenjin-cho, Kiryu 376-8515, Japan
A liquid-core liquid-cladding optical waveguide based on thermal gradients across laminar flow was built with the laminar flow of water in a stainless capillary tube placed in a heat source. Its characteristics were studied with both experiments and a computational fluid dynamics simulation, firstly showing that it had the nature of a graded index optical fiber.