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16 February 2011 Performance of low mode and single mode optical fibers for high peak power 355 nm laser radiation
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For applications of fiber guided pulsed UV-laser radiation in biomedical optics, laser spectroscopy or laser micro processing which need good beam quality low mode or single mode optical fibers are required. We investigated the transmission properties at 355 nm wavelength with laser peak powers up to 5 GW/cm2 or laser fluences up to 9.5 J/cm2. In some cases fibers were damaged during prolonged irradiation at this intensity level. So these fluences or intensities can be used as estimation for the damage threshold. It turns out, that degradation or microstructural damage in the fiber core plays a minor role in long term transmission as long as the intensity stays below the damage threshold. Fiber lengths of many meters are possible. Single mode UV laser beam guiding is possible. UV beam guiding with high pulse repetition rate, moderate peak power will be compared with that of moderate repetition frequency, high peak power lasers
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Georg Hillrichs, Cornell Gonschior, Karl-Friedrich Klein, and René Wandschneider "Performance of low mode and single mode optical fibers for high peak power 355 nm laser radiation", Proc. SPIE 7894, Optical Fibers, Sensors, and Devices for Biomedical Diagnostics and Treatment XI, 78940Z (16 February 2011);

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