From Localized Laser Energy Absorption to Absorption Delocalization at Volumetric Glass Modification with Gaussian and Doughnut-Shaped Pulses

From Localized Laser Energy Absorption to Absorption Delocalization at Volumetric Glass Modification with Gaussian and Doughnut-Shaped Pulses Full article

Journal

Photonics
ISSN: 2304-6732

Output data

Year: 2023, Volume: 10, Number: 8, Article number : 882, Pages count : 12 DOI: 10.3390/photonics10080882

Tags

volumetric modification; femtosecond laser pulses; laser processing; fused silica; Maxwell’s equations; thermoelastoplastic modeling; laser-induced shock waves

Authors

Zukerstein Martin ¹ , Zhukov Vladimir P. ^1,2,3 , Meshcheryakov Yuri P. ⁴ , Bulgakova Nadezhda M. ¹

Affiliations

1	HiLASE Centre, Institute of Physics ASCR, 25241 Dolni Brezany, Czech Republic
2	Federal Research Center for Information and Computational Technologies, Novosibirsk 630090, Russia
3	Novosibirsk State Technical University, Novosibirsk 630073, Russia
4	Design and Technology Division, Lavrentyev Institute of Hydrodynamics SB RAS, Novosibirsk 630090, Russia

Funding (1)

Министерство науки и высшего образования Российской Федерации

FWGG-2021-0014

Volumetric modification of transparent materials by femtosecond laser pulses is successfully used in a wide range of practical applications. The level of modification is determined by the locally absorbed energy density, which depends on numerous factors. In this work, it is shown experimentally and theoretically that, in a certain range of laser pulse energies, the peak of absorption of laser radiation for doughnut-shaped (DS) pulses is several times higher than for Gaussian ones. This fact makes the DS pulses very attractive for material modification and direct laser writing applications. Details of the interactions of laser pulses of Gaussian and doughnut shapes with fused silica obtained by numerical simulations are presented for different pulse energies and compared with the experimentally obtained data. The effect of absorbed energy delocalization with increasing laser pulse energy is demonstrated for both beam shapes, while at relatively low pulse energies, the DS beam geometry provides stronger local absorption compared to the Gaussian geometry. The implications of a DS pulse action for post-irradiation material evolution are discussed based on thermoelastoplastic modeling.

Zukerstein M. , Zhukov V.P. , Meshcheryakov Y.P. , Bulgakova N.M.
From Localized Laser Energy Absorption to Absorption Delocalization at Volumetric Glass Modification with Gaussian and Doughnut-Shaped Pulses
Photonics. 2023. V.10. N8. 882 :1-12. DOI: 10.3390/photonics10080882 WOS Scopus РИНЦ OpenAlex

Web of science:	WOS:001056459800001
Scopus:	2-s2.0-85168919372
Elibrary:	62437649
OpenAlex:	W4385420308

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