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An intense infrared free electron laser (IRFEL) causes laser ablation with an emission of visible luminescence from solids samples. In the case of zinc selenide crystals (ZnSe), the focused IRFEL pulse induces the ablation on the surface because of its high peak power density, despite ZnSe being normally transparent to infrared light. The pulsed IRFELs are at 9.2- and 10.2-μm in wavelength and of...
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