Two-photon fluorescence-assisted laser ablation of non-planar metal surfaces: fabrication of optical apertures on tapered fibers for optical neural interfaces.

@article{Balena2020TwophotonFL,
  title={Two-photon fluorescence-assisted laser ablation of non-planar metal surfaces: fabrication of optical apertures on tapered fibers for optical neural interfaces.},
  author={Antonio Balena and Marco Bianco and Filippo Pisano and Marco Pisanello and Leonardo Sileo and Bernardo L. Sabatini and Massimo de Vittorio and Ferruccio Pisanello},
  journal={Optics express},
  year={2020},
  volume={28 15},
  pages={
          21368-21381
        }
}
We propose a feedback-assisted direct laser writing method to perform laser ablation of fiber optic devices in which their light-collection signal is used to optimize their properties. A femtosecond-pulsed laser beam is used to ablate a metal coating deposited around a tapered optical fiber, employed to show the suitability of the approach to pattern devices with a small radius of curvature. During processing, the same pulses generate two-photon fluorescence in the surrounding environment and… 
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