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JOURNALS // Optics and Spectroscopy // Archive

Optics and Spectroscopy, 2022 Volume 130, Issue 4, Pages 493–498 (Mi os1704)

This article is cited in 1 paper

International Scientific and Technical Conference "Ultrafast Optical Phenomena". October 4-8, 2021, Moscow
Laser physics and laser optics

High-NA focusing of ultrashort laser pulses in bulk of ZnSe

Yu. S. Gulinaab, S. I. Kudryashovb, N. A. Smirnovb, E. V. Kuz'minb

a Bauman Moscow State Technical University, Moscow, Russia
b P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia

Abstract: A study of high-NA focusing process of ultrashort laser pulses in bulk of ZnSe has been carried out. It is shown that when focusing laser Gaussian beam with high-aperture lenses into a transparent medium aberration distortions occur leading to an increase in focal spot size. The results of experimental studies on ablation of front and back surfaces of a plane-parallel plate with 4 mm thickness made of ZnSe by laser pulses with a duration of 0.3 ps, 1 ps, 10 ps and a wavelength of 1030 nm focused by a micro lens (NA = 0.55) are presented. It is shown that at low pulse energies focusing can be considered in a linear mode in which focal spot size is due to aberration distortions.

Keywords: direct laser writing, femtosecond laser pulses, high-NA focusing, ablation, aberrations.

Received: 20.12.2021
Revised: 20.12.2021
Accepted: 30.12.2021

DOI: 10.21883/OS.2022.04.52261.45-21



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