Modeling of fluorescence emission from cyanine-dye-impregnated Langmuir-Blodgett films deposited on the surface of an optical fiber

Fluorescence emission was collected from cyanine-dye-impregnated Langmuir-Blodgett (LB) films of cadmium arachidate deposited on the surface of a quartz multimode optical fiber. A Y-type fiber optic coupler system was used to allow remote, distal-end spectral excitation and collection as the fiber tip was repeatedly dipped into the LB trough. Built-up LB films of up to 400 LB layers were examined. Fluorescence emission intensities were modeled as a function of the number of layers, or LB film thickness, using a simplified theory based on planar thin film optics. The fit of theory to experiment was qualitatively satisfying, indicating that LB films of reasonable optical quality can be deposited on the surface of cylindrical optical fibers. © 1991.

Duke Scholars

Author William M. Reichert Biomedical Engineering