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100 kHz diffraction-limited femtosecond laser machining

Abstract : We demonstrate active and adaptive wavefront correction of a 100 kHz amplified femtosecond laser chain, and investigate the subsequent improvement for micromachining applications. Thanks to a non-pixelated liquid crystal modulator, phase-front distorsions are decreased down to landa/15 peak-valley and landa/100 rms. Clean 1.7 µm diffraction-limited micro-holes are obtained, both on low-threshold metallic and high-threshold dielectric materials. This high beam quality femtosecond source enables diffraction-limited high-speed micromachining.
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Contributor : Nicolas Huot <>
Submitted on : Monday, December 4, 2006 - 10:15:39 AM
Last modification on : Sunday, February 9, 2020 - 10:08:03 PM


  • HAL Id : ujm-00118042, version 1



Nicolas Sanner, Nicolas Huot, Eric Audouard, Christian Larat, Pierre Laporte, et al.. 100 kHz diffraction-limited femtosecond laser machining. Applied Physcics B, 2005, 80, pp.27-30. ⟨ujm-00118042⟩



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