1 July 2003 Side- and end-illumination of polymer optical fibers in the UV region
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Since more than 2 decades, the polymer optical fiber (POF) based on PMMA is well known. A lot of applications were studied and initiated: in addition to data transmission, the automotive, lighting and sensor applications are of main interest. Due to the spectral attenuation and applications, light-sources like broadband metal-halide lamps and halogen lamps, or LEDs and laser-diodes are mainly used. Due to improvement in manufacturing of the standard step-index POF, the variations of the spectral attenuation in the blue region have been reduced. Therefore, the losses are acceptable for short-length applications in the UV-A region. Using different light-sources like high-power Xenon-lamp, deuterium-lamp or UV-LEDs, the UV-damage is an important factor. In addition to the basic attenuation, the UV-induced losses will be determined by experiment, in the interesting UV-A region. The higher flexibilty of the thick-core POF is superior in comparison to silica or glass fibers with the same outer diameter. Therefore, the bending losses in the UV-region are important, too. For special applications in the medical field, side-illuminating fibers are highly accepted. The axial and spectral dependence on the lateral radiation pattern will be described, using a very thick fiber.
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Hanns-S. Eckhardt, Hanns-S. Eckhardt, B. Jungling, B. Jungling, Karl-Friedrich Klein, Karl-Friedrich Klein, Hans Poisel, Hans Poisel, } "Side- and end-illumination of polymer optical fibers in the UV region", Proc. SPIE 4957, Optical Fibers and Sensors for Medical Applications III, (1 July 2003); doi: 10.1117/12.478064; https://doi.org/10.1117/12.478064

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