Atomic and Molecular Pulsed Lasers最新文献_第4页

Fraunhofer diffraction and the beam quality β factor of a laser beam with sinusoidal wavefront 正弦波前激光束的夫琅和费衍射与光束质量β因子

Atomic and Molecular Pulsed Lasers Pub Date : 2021-12-02 DOI: 10.1117/12.2614009

D. A. Yagnyatinskiy, V. Fedoseyev

{"title":"Fraunhofer diffraction and the beam quality β factor of a laser beam with sinusoidal wavefront","authors":"D. A. Yagnyatinskiy, V. Fedoseyev","doi":"10.1117/12.2614009","DOIUrl":"https://doi.org/10.1117/12.2614009","url":null,"abstract":"The effect of the amplitude and spatial frequency of a sinusoidal wavefront over a square aperture on the far-field diffraction pattern is considered for a laser beam. An analytical solution of the Fraunhofer diffraction problem for a 2D sinusoidal wavefront over a rectangular aperture with an arbitrary integer number of periods along each side is derived using an original technique. The result coincides with high accuracy with a numerical solution obtained using the Fast Fourier Transform. It has been shown that after correcting the second-order Zernike modes by a stacked array piezoelectric deformable mirror with different numbers and patterns of control actuators, the residual wavefront aberrations may be considered approximately sinusoidal. Therefore, the results for an ideal sinusoidal wavefront could be applied to a real residual wavefront in problems of adaptive optics. For sinusoidal aberrations, the so-called beam quality β factor has been shown to increase sharply as the root-mean-square wavefront error (RMS) passes certain values. A new criterion of wavefront quality for sinusoidal and residual aberrations over a square aperture has been proposed.","PeriodicalId":205170,"journal":{"name":"Atomic and Molecular Pulsed Lasers","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123129619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Methods for determining the residual amount of antibiotics in food 食品中抗生素残留量的测定方法

Atomic and Molecular Pulsed Lasers Pub Date : 2021-12-02 DOI: 10.1117/12.2593802

O. Tchaikovskaya, V. S. Chaydonova, M. Ashmarina

引用次数: 0

Phase control of an azimuthally polarized beam synthesized by an array of fiber lasers 由光纤激光器阵列合成的方位偏振光的相位控制

Atomic and Molecular Pulsed Lasers Pub Date : 2021-12-02 DOI: 10.1117/12.2613647

E. Adamov, V. Aksenov, V. V. Dudorov, V. V. Kolosov, M. E. Levitskii

{"title":"Phase control of an azimuthally polarized beam synthesized by an array of fiber lasers","authors":"E. Adamov, V. Aksenov, V. V. Dudorov, V. V. Kolosov, M. E. Levitskii","doi":"10.1117/12.2613647","DOIUrl":"https://doi.org/10.1117/12.2613647","url":null,"abstract":"The control over beams with distributed polarization opens new ways for a wide range of applications from optical communications to laser processing of materials. This paper proposes a simple and efficient method of controlling the spatial characteristics of azimuthally polarized beams synthesized as a result of coherent combining of Gaussian beams emitted by a spatially ordered array of fiber lasers. The proposed method is based on maintaining the specified phase relations between the array subbeams by placing a phase forming element - a liquid crystal spatial light modulator - in the active feedback loop. A distinctive feature of the proposed method is the possibility of full control over beams with distributed polarization with phase control of only one component of the electric field. This leads to the significantly simpler design of the experiment. The mathematical model of beam formation and the algorithm of phase control of beams with spatially distributed polarization are discussed. The generation of beams with spatially distributed polarization, including cylindrical vector beams (CVB) and optical vortex beams (OVB), is demonstrated experimentally. The results of the experiment with an array of six fiber lasers are in a good agreement with the results of numerical simulation.","PeriodicalId":205170,"journal":{"name":"Atomic and Molecular Pulsed Lasers","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130187480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Vortex beam generation by means of control of the piston shift of a fiber array using a phase forming DOE in active feedback loop 利用有源反馈环路中的相位形成DOE控制光纤阵列活塞位移产生涡旋束

Atomic and Molecular Pulsed Lasers Pub Date : 2021-12-02 DOI: 10.1117/12.2613693

E. Adamov, V. Aksenov, V. V. Dudorov, V. V. Kolosov, M. E. Levitskii

引用次数: 1

Spectrum broadening of second harmonic femtosecond pulse in nonlinear crystal 非线性晶体中二次谐波飞秒脉冲的频谱展宽

Atomic and Molecular Pulsed Lasers Pub Date : 2021-12-02 DOI: 10.1117/12.2613936

S. Alekseev, V. Losev, V. Trunov, S. Frolov

引用次数: 0

High-intensity light channels formed during the propagation of high-power femtosecond laser radiation in air 高功率飞秒激光在空气中传播时形成的高强度光通道

Atomic and Molecular Pulsed Lasers Pub Date : 2021-12-02 DOI: 10.1117/12.2601905

D. V. Apeksimov, Y. Geints, A. Zemlyanov, A. Iglakova, G. Matvienko, O. Minina, V. Oshlakov, A. V. Petrov

{"title":"High-intensity light channels formed during the propagation of high-power femtosecond laser radiation in air","authors":"D. V. Apeksimov, Y. Geints, A. Zemlyanov, A. Iglakova, G. Matvienko, O. Minina, V. Oshlakov, A. V. Petrov","doi":"10.1117/12.2601905","DOIUrl":"https://doi.org/10.1117/12.2601905","url":null,"abstract":"The evolution of the small-scale transverse structure of high-power femtosecond laser radiation propagating in air in the filamentation mode has been experimentally and theoretically studied. Experimental results were obtained using wideaperture (centimeter) collimated beams of femtosecond pulses of a titanium-sapphire laser. As a result, the features of propagation of spatially isolated high-intensity light channels, the diameter of which is several millimeters, were determined. They are formed because of Kerr self-focusing of intensity inhomogeneities in the initial transverse profile of the laser beam. It is shown that the formation of a filament (a localized light structure, the existence of which is associated with the plasma formation and the generation of conical emission) does not occur in each of these channels. The theoretical evaluation of this light channels characteristics was carried out. It is based on the diffraction-ray model of single filamentation of femtosecond laser pulses. Studying of the evolution transverse profile of a laser beam with a centimeter radius and subterawatt power along air path showed that the initial radius of intensity inhomogeneities, for which laser filamentation occur, is equal several (2.5-3.5) millimeters. The power in these inhomogeneities varies from 19 to 26 GW. Differences in the values of the radius and power of these inhomogeneities are the cause of different distances from the laser pulse source at which their self-focusing occurs.","PeriodicalId":205170,"journal":{"name":"Atomic and Molecular Pulsed Lasers","volume":"294 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134430440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of laser radiation parameters for an affect on pigments, based on titanium dioxide (TiO2) 基于二氧化钛(TiO2)的激光辐射参数对颜料影响的优化研究

Atomic and Molecular Pulsed Lasers Pub Date : 2021-12-02 DOI: 10.1117/12.2616446

Aleksei Lichnyi, Irina Nam, Ekaterina Dikman

引用次数: 0

The influence of the counterion type on the luminescent properties of organo-soluble europium complexes 反离子类型对有机可溶性铕配合物发光性质的影响

Atomic and Molecular Pulsed Lasers Pub Date : 2021-12-02 DOI: 10.1117/12.2612793

Zinaida A. Charyshnikova, A. V. Kharcheva, A. Ivanov, N. Borisova, S. Patsaeva

引用次数: 0

Interface features and electronic structure of Bi2SiO5/β-Bi2O3 hetero-junction Bi2SiO5/β-Bi2O3异质结的界面特征和电子结构

Atomic and Molecular Pulsed Lasers Pub Date : 2021-12-02 DOI: 10.1117/12.2614020

E. A. Kovaleva, O. Vodyankina, V. Svetlichny

引用次数: 2

Computer modeling of XeCl-lasers xecl激光器的计算机建模

Atomic and Molecular Pulsed Lasers Pub Date : 2021-12-02 DOI: 10.1117/12.2613963

S. Anufrick, A. Volodenkov, K. Znosko, V. Losev

引用次数: 0