Aberration-insensitive three-dimensional micromachining in glass with spatiotemporally shaped femtosecond laser pulses.

  title={Aberration-insensitive three-dimensional micromachining in glass with spatiotemporally shaped femtosecond laser pulses.},
  author={Peng Wang and Wei Chu and Wenbo Li and Yuanxin Tan and Jia Qi and Yang Liao and Zhanshan Wang and Ya Cheng},
  journal={Optics letters},
  volume={43 15},
We observe that focusing a femtosecond laser beam simultaneously chirped in time and space domains in glass can efficiently suppress the optical aberration caused by the refractive index mismatch at the interface of air and the glass sample. We then demonstrate three-dimensional microprocessing in glass with a nearly invariant spatial resolution for a large range of penetration depth between 250 μm and 9 mm without any aberration correction. 

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