High-NA Focusing of Ultrashort Laser Pulses in Bulk of ZnSe

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 experimen...

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Bibliographic Details
Published inOptics and spectroscopy Vol. 131; no. 10; pp. 980 - 985
Main Authors Gulina, Yu. S., Kudryashov, S. I., Smirnov, N. A., Kuzmin, E. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.10.2023
Springer Nature B.V
Subjects
Aberration
Ablation
Gaussian beams (optics)
Lasers
Optical Devices
Optics
Parallel plates
Photonics
Physics
Physics and Astronomy
high-NA focusing
aberrations
direct laser writing
femtosecond laser pulses
ablation
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Summary: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, 1, 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.
ISSN:0030-400X
1562-6911
DOI:10.1134/S0030400X23100077