Zhi Luo, Cong Wang, Xinran Dong, Ji’an Duan, "Femtosecond laser highly-efficient plane processing based on an axicon-generated donut-shaped beam," Chin. Opt. Lett. 16, 031401 (2018)
- Chinese Optics Letters
- Vol. 16, Issue 3, 031401 (2018)
Fig. 1. (a) Geometrical evolution from a Gaussian beam to a donut-shaped beam. (b),(d) The top view and side view of a beam focused by a cylindrical lens. (c),(e) The top view and side view of a donut-shaped beam formed with an axicon.
Fig. 2. CLSM images of fs laser fabrication by (a) an axicon-generated donut-shaped beam and (b) a cylindrical directly focused beam. (c),(d) The corresponding cross-sectional profiles.
Fig. 3. Donut-shaped beam polished surfaces with different scanning speeds. (a) 0.1 mm / s 0.2 mm / s 0.4 mm / s 0.6 mm / s 0.8 mm / s 1.0 mm / s 1.2 mm / s 1.4 mm / s
Fig. 4. Influence of (a) the scanning speed and the laser pulse energy, and (b) the scanning times on the roughness of processed surfaces by the donut-shaped beam.
Fig. 5. Relationship between the scanning width and the relative distance from the lens to the objective.
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