Iliya Gritsenko- PhD Student at Russian Academy of Sciences
Iliya Gritsenko
- PhD Student at Russian Academy of Sciences
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15
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Introduction
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Publications
Publications (15)
Исследованы изменения фазового набега и длины, а также пространственной структуры двулучепреломляющих микротреков, записанных в объеме плавленого кварца в режиме жесткой фокусировки(числовая апертура NA = 0.45 и 0.55) лазерными импульсами с длиной волны 1030 нм, длительностью
0.3 и 0.6 пс, при варьировании энергии импульсов. Показано, что по мере у...
Исследованы характеристики двулучепреломляющих микротреков, записанных ультракороткими лазерными импульсами с варьируемыми параметрами в объёме плавленого кварца. В частности, наблюдается образование двулучепреломляющих микротреков с фазовым сдвигом до 150o, при этом направление медленной оси совпадает с направлением вектора линейной поляризации ин...
The absorption of light in the near-infrared region of the electromagnetic spectrum by Au-hyperdoped Si has been observed. While silicon photodetectors in this range are currently being produced , their efficiency is low. Here, using the nanosecond and picosecond laser hyperdoping of thin amorphous Si films, their compositional (energy-dispersion X...
We present the results of an experimental study of multiphoton ionization in fused silica,
using a linearly polarized femtosecond Satsuma fiber laser with an active medium based on Yb+3 ions,
at 515 -nm and 1030 -nm wavelengths. The radiation transmission in the fused silica was measured
as a function of the laser intensity and wavelength and the d...
The transport-of-intensity equation provides a new non-interferometric and non-iterative access to quantitative information about the phase of a light wave by measuring intensity distributions. This equation can be used to implement a simple and accurate spatial phase measurement for optical testing of spherical surfaces. The method requires only a...
A straightforward method based on a solution of the transport-of-intensity equation for laser beam quality M2 factor measurement is presented. Demonstrated experimental results prove that the approach is valid. Reconstruction of the other laser beam spatial parameters is presented, namely: radius, waist position, angular divergence, Rayleigh length...
A development of a method for measuring the refractive index of optical media based on the transport-of-intensity equation (TIE) is proposed. The method requires only a complementary metal-oxide semiconductor (CMOS) camera, which registers intensity distributions in several planes. The obtained intensity distributions are used to solve the TIE, kno...
Single-shot surface ablation of (001) and (111) oriented natural diamond plates was performed by tightly focused (numerical aperture NA = 0.65) 1030-nm 0.3-picosecond laser pulses with variable polarization azimuth. Surface craters were characterized by scanning electron microscopy in terms of characteristic ablation 1/e-radii and threshold fluence...
A simple method for reconstructing the spatial parameters of a laser beam, based on the transport-of-intensity equation, is presented. Registration of cross-section intensity distributions in several planes was carried out using a single CMOS camera. The processing of the experimental measurements with the help of specialized software helped to rec...
Recently the transport-of-intensity equation as a phase imaging method turned out as an effective microscopy method that does not require the use of high-resolution optical systems and a priori information about the object. In this paper we propose a mathematical model that adapts the transport-of-intensity equation for the purpose of wavefront sen...
An algorithm that automatically calculates aberrations in the holographic wavefront sensor scheme previously proposed by the authors is described, which enables measuring aberrations by means of iterative generation of holograms on a phase spatial light modulator (SLM). The practical implementation of this algorithm on the basis of the feedback of...
An algorithm that automatically calculates aberrations in the holographic wavefront sensor scheme previously proposed by the authors is described, which enables measuring aberrations by means of iterative generation of holograms on a phase spatial light modulator (SLM). The practical implementation of this algorithm on the basis of the feedback of...
