Open AccessЖесткая фокусировка ультракоротких лазерных импульсов в объем ZnSe
Author(s) -
Ю.С. Гулина,
С.И. Кудряшов,
Н.А. Смирнов,
Е.В. Кузьмин
Publication year - 2022
Publication title -
optika i spektroskopiâ
Language(s) - English
Resource type - Journals
eISSN - 2782-6694
pISSN - 0030-4034
DOI - 10.21883/os.2022.04.52261.45-21
Subject(s) - optics , spherical aberration , laser , lens (geology) , materials science , gaussian beam , wavelength , numerical aperture , aperture (computer memory) , focal length , ablation , angular aperture , beam (structure) , physics , engineering , acoustics , aerospace engineering
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 0.3ps, 1ps, 10ps and a wavelength of 1030nm 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.