Characterization of Fluorescence Induced by Side Illumination of Rhodamine B Doped Plastic Optical Fibers

Abstract

Acrylic plastic optical fibers containing the laser dye Rhodamine B chloride have been drawn from unclad doped acrylic preforms. Different samples of these doped plastic optical fibers were illuminated laterally with a He-Ne laser centered at 543.4nm and the fluorescence was induced. Experimental results show evidence that the fluorescence peak position and absorption coefficient are determined by the fiber length and dye concentration. A rate of (5.55 ± 0.32) nm/cm of the fluorescence red shift and (0.41 ± 0.02)/cm at λ λ=600 nm of the absorption coefficient was obtained by one sample doped at 0.0001 mol%.