High-speed two-photon polymerization 3D printing with a microchip laser at its fundamental wavelength

Abstract

High-resolution, high-speed 3D printing by two-photon polymerization (2PP) with a Nd:YVO 4 Q-switched microchip laser at its fundamental wavelength of 1064 nm is demonstrated. Polymerization scan speeds of up to 20 mm/s and feature sizes of 250 nm are achieved using a high repetition rate Q-switched microchip laser with a semiconductor saturable absorber mirror (SESAM) and photoresist with a new photo-initiator bearing 6dialkylaminobenzufuran as electron donor and indene-1,3-dione moiety as electron acceptor. The obtained results demonstrate the high potential of Q-switched microchip lasers for applications in 2PP 3D printing.

The Printing Parameters Effects on the Dimensional Accuracy of the Parts Made of Photosensitive Resin

“…Since 1984, when the first patent for stereolithography (SLA (US4575330A) [ 1 ] has published, other related technologies appeared on the market, such as continuous liquid interface production (CLIP), digital light processing (DLP), liquid crystal display (LCD), multi jet printing (MJP), two‐photon polymerization (2TPP) [ 2 ] and hologram 3D printing. [ 3 ] Electromagnetic radiation is used to cure the photosensitive liquid monomer, also known as resin.…”

Recent advances on push–pull organic dyes as visible light photoinitiators of polymerization

“…Finally, it has to be noticed that the use of indane-1,3-dione-based dyes was not limited to single-photon photopolymerization and that a few structures were also developed for two-photon polymerization (2PP). Chemical structures of the three dyes PP30, PP31 [180] and PP32 [181] used since 2015 are presented in the Fig. 18.…”

Additive manufacturing for adsorption‐related applications—A review

“…[ 201 ] However, this method in industry is limited since the femtosecond laser is expensive, complex, and sensible to the environment. [ 202 ]…”