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首页> 外文会议>Conference on Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications >Thin Hollow Glass Waveguide for Near IR Radiation Delivery
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Thin Hollow Glass Waveguide for Near IR Radiation Delivery

机译：薄的空心玻璃波导，用于近红外辐射递送

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The delivery of the radiation by thin fiber is required for some application, especially in medical internals treatment. Therefore a new 100 μm and 250 μm inner diameter hollow glass waveguides were developed and investigated for the possibility to transport high power near infrared laser radiation without damage of these delivery systems. As laser sources two Nd:YAG laser systems working in Q-switched regime at wavelength 1.06 μm and 1.34 μm were utilized. Delivered radiation characterization was performed. By Alexandrite laser (755 nm) pumped Q-switched Nd:YAG laser has been generating 1.06 μm wavelength radiation with 6 ns length of pulse and maximum output energy 0.7 mJ (116.7 kW). The laser was Q-switched using LiF:F~(2-) saturable absorber. Second laser system was Nd:YAG/V:YAG microchip pumped by laser diode operating at 808 nm. The radiation at 1.3 μm wavelength has been generated with 250 Hz repetition rate. Pulse length was 6 ns and mean output power 25 mW. Corresponding pulse energy and peak power was 0.1 mJ and 16.7 kW, respectively. Both lasers were operating in fundamental TEMoo mode (M~2 ～ 1). For delivery a special cyclic olefin polymer-coated silver hollow glass waveguides with the inner/outer diameters 100/190 um and 250/360 urn were used. The delivery system was consisted of lens, protector, and waveguide. As results the transmission more than 55 % and reasonable spatial profile of laser output radiation were found. From these measurements it can be recommended using of this system for near infrared powerful radiation delivery as well as for medical treatment.
机译：一些应用需要薄纤维的辐射递送，特别是在医疗内部治疗中。因此，开发了一种新的100μm和250μm内径的中空玻璃波导，并研究了在红外激光辐射附近运输高功率而不会损坏这些递送系统。作为激光源的两个ND：在波长为1.06μm和1.34μm的Q开关调节中工作的YAG激光系统。进行辐射表征。通过Alexandrite Laser（755nm）泵浦Q开关Nd：YAG激光器已经产生1.06μm波长辐射，6 ns脉冲长度和最大输出能量0.7 mj（116.7 kW）。使用LIF Q开关激光：F〜（2-）可饱和吸收器。第二激光系统是ND：YAG / V：由激光二极管泵送的YAG微芯片，在808nm处运行。已经产生了250 Hz重复率为1.3μm波长的辐射。脉冲长度为6 ns，平均输出功率25 mW。相应的脉冲能量和峰值功率分别为0.1MJ和16.7 kW。两个激光器都以基本的特点模式（M〜2〜1）运行。为了递送一个特殊的环烯烃聚合物涂覆的银色中空玻璃波导，使用内/外径100/190 um和250/360 urn。输送系统由透镜，保护器和波导组成。结果，发现，发现传输超过55％的激光输出辐射的合理空间轮廓。从这些测量开始，可以推荐使用该系统进行近红外强大的辐射交付以及医疗。

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