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首页> 外文会议>Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications VI; Progress in Biomedical Optics and Imaging; vol.7 no.6 >Fiber-delivery system for high-power UV-A lightsources
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Fiber-delivery system for high-power UV-A lightsources

机译：大功率UV-A光源的光纤传输系统

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摘要

For medical and analytical applications, thick-core fibers are widely spread. For special applications in the UV-A region, flexible and inexpensive fibers with high transmission in this wavelength region are required. On the other hand, new high-power UV-A light sources (LEDs, laser-diodes) are available in this wavelength region. Although silica-based UV-fibers are mainly used over the full UV-range, there are two additional candidates for the UV-A region: the Polymer Optical Fiber (POF) and the Polymer Clad Silica Fiber (PCSF). Especially, the higher flexibility of the thick-core POF is superior in comparison to silica fibers with the same outer diameter. However, UV-induced losses exist in these fibers, too, using UV-light sources with significant power below 350 nm wavelength. However, the UV-damage with UV-light above this wavelength is significantly reduced; test results with high-power 365 nm UV-LED and 375 nm laser-diodes will be shown and discussed. On the other hand, the entire fiber-optic system, including the light-source, will be characterized. Especially the coupling efficiency between the light-source and the fibers was studied theoretically and experimentally.
机译：在医学和分析应用中，厚芯纤维被广泛传播。对于在UV-A区域中的特殊应用，需要在此波长区域中具有高透射率的柔性且廉价的光纤。另一方面，在此波长范围内可以使用新的高功率UV-A光源（LED，激光二极管）。尽管基于二氧化硅的UV纤维主要用于整个UV范围，但对于UV-A区域还有两种其他选择：聚合物光纤（POF）和聚合物包覆二氧化硅纤维（PCSF）。特别地，与具有相同外径的二氧化硅纤维相比，厚芯POF的更高的柔韧性是优越的。但是，使用波长低于350 nm的显着功率的UV光源，这些光纤中也存在UV引起的损耗。但是，此波长以上的紫外线对紫外线的损害已大大降低；将显示和讨论高功率365 nm UV-LED和375 nm激光二极管的测试结果。另一方面，将对包括光源在内的整个光纤系统进行特征化。尤其是从理论和实验上研究了光源与光纤之间的耦合效率。

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