23 February 2018 Fiber-coupled three-micron pulsed laser source for CFRP laser treatment
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We present a laser source providing up to 18 W and 1.5 mJ at a wavelength of 3 μm. The output is generated by frequency conversion of randomly polarized multimode radiation at 1064 nm of an Nd:YAG laser in a two-stage conversion setup. The frequency converter comprises an optical parametric oscillator and a subsequent optical parametric amplifier using PPLN as nonlinear medium in both stages. To implement fiber-based beam delivery for materials processing, we coupled the output at 3 μm to a multimode ZrF4-fiber. This source was then used to remove epoxy resin from the surface of CFRP samples.
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Sebastian Nyga, David Blass, Veronika Katzy, Thomas Westphalen, Bernd Jungbluth, Hans-Dieter Hoffmann, "Fiber-coupled three-micron pulsed laser source for CFRP laser treatment", Proc. SPIE 10511, Solid State Lasers XXVII: Technology and Devices, 105110G (23 February 2018); doi: 10.1117/12.2288343; https://doi.org/10.1117/12.2288343

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