Two-photon polymerization of femtosecond high-order Bessel beams with aberration correction

Abstract

In the femtosecond two-photon polymerization (2PP) experimental system, optical aberrations degrade the fabrication quality. To solve this issue, a multichannel interferometric wavefront sensing technique is adopted in the adaptive laser processing system with a single phase-only spatial light modulator. 2PP fabrications using corrected high-order Bessel beams with the above solution have been conducted, and high-quality microstructure arrays of microtubes with 20 μm diameter have been rapidly manufactured. The effectiveness of the proposed scheme is demonstrated by comparing the beam intensity distributions and 2PP results before and after aberration corrections.

Abruptly Autofocusing Vortex Beams for Rapid Controllable Femtosecond Two-Photon Polymerization

“…Taking two sets of parameters of the AAFV beams as examples, by loading the corresponding phase masks on the SLM, we generated AAFV beams with two different accelerating trajectories in the direct space. Meanwhile, to compensate for the optical aberrations mainly caused by the spatial walk-off effect in the SHG, we used the method proposed in [ 37 , 38 ] to realize in situ aberrations’ correction, thus improving the optical quality of the modulated AAFV beams and the quality of the fabricated structures.…”

Incoherent Airy and Bessel-Vortex Beams

“…Tailoring the spatial and temporal properties of light beams stand as cornerstones in recent optics researches and applications [1,2] for both scientific exploration and technological advancement. In addition, optical beam shaping revolutionizes the manipulation of light while facilitating control and precision in directing optical energy [3,4]. The utilization of accelerating Airy and Bessel (or Bessel-Vortex) beams have emerged particular interest among these techniques due to their unique non-diffracting nature and unpredicted propagation behaviors [5,6].…”