Material Removal and Thermal Impact of Femtosecond-Laser Polishing for Germanium-Based Freeform Optics

Taylor, L. L.; Frechem, Joshua; Han, Hainian; Ji-cun, XU; Smith, Tom E. C.; Pomerantz, Michael; Lambropoulos, John C.; Qiao, Jie

doi:10.1364/oft.2017.otu3b.4

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2019

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“…The unique advantages of femtosecond laser, including high peak power and high accuracy of ablation on metal targets, have been utilized widely. Recently, Taylor et al 9 investigated experimentally the effectiveness of femtosecond lasers as alternative laser sources for noncrystalline silicon and germanium polishing. They found that both the laser pulse energy and the overlapping rate of the laser beam influence the surface roughness in femtosecond laser polishing; in addition, the mechanisms for femtosecond laser polishing of nonmetals have been investigated.…”

Section: Introductionmentioning

confidence: 99%

Influence of energy fluence and overlapping rate of femtosecond laser on surface roughness of Ti-6Al-4V

et al. 2019

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The Ti-6Al-4V polished by femtosecond laser processing is first investigated. The surface nanoparticles of Ti-6Al-4V induced by femtosecond laser have been characterized by scanning electron microscopy and energy dispersive spectrometry, and the influence of laser fluence and the overlapping rate of laser beam on surface roughness have also been analyzed. Moreover, the relationship between the laser parameters and the surface roughness of Ti-6Al-4V has been revealed, and the fine surface roughness of Ti-6Al-4V is obtained based on the optimized femtosecond laser processing parameters.

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Section: Introductionmentioning

confidence: 99%