Optical Design and Engineering

Augmentation of direct laser writing fabrication throughput for three-dimensional structures by varying focusing conditions

[+] Author Affiliations
Linas Jonušauskas

Vilnius University, Faculty of Physics, Department of Quantum Electronics, Laser Research Center, Saulėtekio Ave. 10, LT-10223, Vilnius, Lithuania

Sima Rekštytė

Vilnius University, Faculty of Physics, Department of Quantum Electronics, Laser Research Center, Saulėtekio Ave. 10, LT-10223, Vilnius, Lithuania

Mangirdas Malinauskas

Vilnius University, Faculty of Physics, Department of Quantum Electronics, Laser Research Center, Saulėtekio Ave. 10, LT-10223, Vilnius, Lithuania

Opt. Eng. 53(12), 125102 (Dec 17, 2014). doi:10.1117/1.OE.53.12.125102
History: Received September 17, 2014; Accepted November 7, 2014
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Abstract.  We propose a laser fabrication approach for single monolith structure by varying beam focusing lenses (NA1=1.4 and NA2=0.45). With this, we show great improvement of the manufacturing throughput while keeping the desired spatial resolution and feature definition. To quantitatively evaluate its efficiency, we theoretically calculate and experimentally measure the polymerized volume using different focusing conditions and show that the augmentation can reach more than sevenfold. Based on this, sample structures of hybrid organic-inorganic SZ2080 and hydrogel polyethylene (glycol) diacrylate photopolymers were successfully manufactured. These three-dimensional structures included prototype scaffolds for cell growth and microfluidic components. Their quality was assessed and possible difficulties as well as limitations that arose were discussed. The new structures were compared to alternative direct laser writing throughput increasing techniques. Finally, we discussed potential applications in manufacturing various elements for regenerative medicine and microfluidics.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Linas Jonušauskas ; Sima Rekštytė and Mangirdas Malinauskas
"Augmentation of direct laser writing fabrication throughput for three-dimensional structures by varying focusing conditions", Opt. Eng. 53(12), 125102 (Dec 17, 2014). ; http://dx.doi.org/10.1117/1.OE.53.12.125102


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