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Keywords
- Femtosekundenlaser (4)
- Laserbearbeitung (4)
- Ultrakurzzeitlaser (3)
- Kohlendioxidlaser (2)
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Year of publication
- 2020 (9) (remove)
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- Article (5)
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- no (9)
In this contribution, we report on the generation of internal microchannels with basically unlimited channel length inside of PMMA bulk material by femtosecond laser. A precisely controllable and stable circular channel cross section is obtained by using a spatial light modulator to compensate the writing depth depending spherical aberration. Furthermore, the generation of a rotatable elliptical input beam by adaptive optics ensures a fitting of the beam shaping to the writing direction. In this study, we report on both, the effect of the ellipticity of the input beam and the effect of a correction of the spherical aberration on the circularity of the resulting internal microchannels. Moreover, we demonstrate the application of this writing technique by creating microfluidic testing structures inside of a transparent standard polymer.
Laser-fabricated axicons challenging the conventional optics in glass processing applications
(2020)