Glass processing using microsecond, nanosecond and femtosecond pulsed lasers

Ozkan, Arzu; Migliore, Leonard; Dunsky, Corey M.; Phaneuf, Michael W.

doi:10.1117/12.540701

Cited by 5 publications

(2 citation statements)

References 5 publications

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“…The short duration of the femtosecond laser pulse is advantageous for its reduced thermal accumulation effects and nonlinear absorption compared to longer-duration pulses [ 1 , 6 , 7 ]. The electron–phonon coupling in dielectrics is usually longer than the fs pulse duration, allowing the delivery of the pulse energy quicker than the thermal diffusion occurs—energy transfer to surrounding material via phonon vibrations [ 8 , 9 ]. As a result, heat-accumulation-related stresses can be reduced and, together with higher energy absorption, can be confined to a smaller volume, improving the quality and strength of machined glass parts [ 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Femtosecond Laser Cutting of 110–550 µm Thickness Borosilicate Glass in Ambient Air and Water

et al. 2023

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The cutting quality and strength of strips cut with femtosecond-duration pulses were investigated for different thicknesses of borosilicate glass plates. The laser pulse duration was 350 fs, and cutting was performed in two environments: ambient air and water. When cutting in water, a thin flowing layer of water was formed at the front surface of the glass plate by spraying water mist next to a laser ablation zone. The energy of pulses greatly exceeded the critical self-focusing threshold in water, creating conditions favorable for laser beam filament formation. Laser cutting parameters were individually optimized for different glass thicknesses (110–550 µm). The results revealed that laser cutting of borosilicate glass in water is favorable for thicker glass (300–550 µm) thanks to higher cutting quality, higher effective cutting speed, and characteristic strength. On the other hand, cutting ultrathin glass plates (110 µm thickness) demonstrated almost identical performance and cutting quality results in both environments. In this paper, we studied cut-edge defect widths, cut-sidewall roughness, cutting throughput, characteristic strength, and band-like damage formed at the back surface of laser-cut glass strips.

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Section: Introductionmentioning

confidence: 99%

Femtosecond Laser Cutting of 110–550 µm Thickness Borosilicate Glass in Ambient Air and Water

et al. 2023

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“…The most straightforward way to do that is direct laser abla tion of glasses. Excimer laser machining utilising the large intrinsic optical absorption in the UV has shown promise [2,3] as well as laserinduced nonlinear absorption via ultra short pulses [4][5][6][7]. The longer irradiation timescale of carbon dioxide lasers have allowed melt flow to occur and a degree of polishing to be accomplished [8,9].…”

Section: Introductionmentioning

confidence: 99%

Enhanced chemical etch rate of borosilicate glass via spatially resolved laser-generated color centers

Serkov¹,

Snelling²

2020

J. Phys. D: Appl. Phys.

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In this work, it is shown that controllable increases in chemical reactivity of borosilicate glass can be induced through spatially resolved femtosecond laser irradiation at fluence values significantly lower than the damage threshold. The hydrofluoric acid etch rate has been found to be closely correlated to the reduction in optical transmission of the glass at 488nm, which is, in turn, governed by the production of boron-oxygen hole centers. The combination of laser irradiation below the ablation threshold followed by chemical etching is shown to yield surfaces that have a roughness lower than those achieved by either laser or chemical etching alone. Application of this effect to the manufacture of freeform Laplacian optics is demonstrated.

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Investigation of the surface morphology in glass scribing with a UV picosecond laser

Shin

2019

Optics & Laser Technology

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Glass processing using microsecond, nanosecond and femtosecond pulsed lasers

Cited by 5 publications

References 5 publications

Femtosecond Laser Cutting of 110–550 µm Thickness Borosilicate Glass in Ambient Air and Water

Femtosecond Laser Cutting of 110–550 µm Thickness Borosilicate Glass in Ambient Air and Water

Enhanced chemical etch rate of borosilicate glass via spatially resolved laser-generated color centers

Investigation of the surface morphology in glass scribing with a UV picosecond laser

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