Drilling high aspect ratio holes by femtosecond laser filament with aberrations

2021 ◽  
Author(s):  
Manshi Wang ◽  
Zhiqiang Yu ◽  
Nan Zhang ◽  
Weiwei Liu
Keyword(s):  
Aspect Ratio ◽  
Femtosecond Laser ◽  
High Aspect Ratio

Non-diffraction-length Bessel-beam femtosecond laser drilling of high-aspect-ratio microholes in PMMA

Optik ◽  
2021 ◽  
Vol 229 ◽  
pp. 166295
Author(s):  
Haoran Wang ◽  
Fan Zhang ◽  
Kaiwen Ding ◽  
Ji'an Duan
Keyword(s):  
Aspect Ratio ◽  
Femtosecond Laser ◽  
High Aspect Ratio ◽  
Bessel Beam ◽  
Laser Drilling

High aspect ratio, high-quality microholes in PMMA: a comparison between femtosecond laser drilling in air and in vacuum

2014 ◽  
Vol 119 (1) ◽  
pp. 61-68 ◽  
Author(s):  
Bo Xia ◽  
Lan Jiang ◽  
Xiaowei Li ◽  
Xueliang Yan ◽  
Weiwei Zhao ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Femtosecond Laser ◽  
High Aspect Ratio ◽  
Laser Drilling ◽  
High Quality

Single-pulse femtosecond laser Bessel beams drilling of high-aspect-ratio microholes based on electron dynamics control

2014 ◽  
Author(s):  
Weiwei Zhao ◽  
Xiaowei Li ◽  
Bo Xia ◽  
Xueliang Yan ◽  
Weina Han ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Femtosecond Laser ◽  
High Aspect Ratio ◽  
Single Pulse ◽  
Electron Dynamics ◽  
Bessel Beams

Machining of micrometer-scale high aspect ratio features with single femtosecond laser pulses

2020 ◽  
Vol 32 (3) ◽  
pp. 032021
Author(s):  
Brian K. Canfield ◽  
Lino Costa ◽  
Deepak Rajput ◽  
Alexander Terekhov ◽  
Kathleen Lansford ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Femtosecond Laser ◽  
High Aspect Ratio ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Micrometer Scale

scholarly journals High-aspect ratio nanochannel formation by single femtosecond laser pulses

2010 ◽  
Vol 18 (16) ◽  
pp. 16840 ◽  
Author(s):  
Jeffrey F. Herbstman ◽  
Alan J. Hunt
Keyword(s):  
Aspect Ratio ◽  
Femtosecond Laser ◽  
High Aspect Ratio ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses

scholarly journals Optimization of femtosecond laser cutting of biodegradable polymer for medical devices manufacturing

2016 ◽  
Vol 8 (4) ◽  
pp. 116 ◽  
Author(s):  
Bogusz Stepak ◽  
Arkadiusz J. Antonczak ◽  
Krzysztof M. Abramski
Keyword(s):  
Aspect Ratio ◽  
Femtosecond Laser ◽  
Medical Devices ◽  
Biodegradable Polymer ◽  
High Aspect Ratio ◽  
Laser Cutting ◽  
Laser Micromachining ◽  
Scanning Strategy ◽  
Vascular Stents ◽  
Femtosecond Laser Micromachining

This paper describes the experimental parameters involved in the femtosecond laser micromachining of biodegradable poly(L-lactide) which is frequently used in biomedical applications such as vascular stents or scaffolds. We investigated the influence of laser pulse energy, scanning strategy and number of overscans on the laser cutting throughput. The process parameters that enable reducing of a heat affected zone were determined. As a result, the optimal scanning strategy was determined in order to obtain high aspect ratio trenches in 380 ?m thick biodegradable polymer sheet. Full Text: PDF ReferencesW. Jia et al. "Effects of high-repetition-rate femtosecond laser micromachining on the physical and chemical properties of polylactide (PLA)", Opt. Express 23, 21 (2015). CrossRef F. Hendricks, R. Patel, and V.V. Matylistsky, "Micromachining of bio-absorbable stents with ultra-short pulse lasers", Proc. SPIE 9355, 935502 (2015). CrossRef W.Y. Yeong et al. "Annealing of Biodegradable Polymer Induced by Femtosecond Laser Micromachining", Adv. Eng. Mater. 4, 12 (2010). CrossRef K. Stolberg et al. "IR and green femtosecond laser machining of heat sensitive materials for medical devices at micrometer scale", Proc. SPIE 8968, 89680E (2014). CrossRef F. Hendricks et al. "High aspect ratio microstructuring of transparent dielectrics using femtosecond laser pulses: method for optimization of the machining throughput", Appl. Phys. A 117, 1 (2014). CrossRef A. Antonczak et al. "Degradation of poly(l-lactide) under CO2 laser treatment above the ablation threshold", Polym. Deg. Stab. 109, 97-105 (2014) CrossRef B. Stepak et al. "The influence of ArF excimer laser micromachining on physicochemical properties of bioresorbable poly(L-lactide)", Proc SPIE 9736, 97361T (2016). CrossRef

High-aspect-ratio ZnSe microstructure generated by spatially shaped femtosecond laser writing assisted with wet chemical etching

2022 ◽  
Vol 147 ◽  
pp. 107687
Author(s):  
Sikun Zhou ◽  
Li Shen ◽  
Fangjie Wang ◽  
Yue Li ◽  
Hong Zhang ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Femtosecond Laser ◽  
High Aspect Ratio ◽  
Chemical Etching ◽  
Laser Writing ◽  
Wet Chemical ◽  
Wet Chemical Etching
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