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International Conference on Coherent and Nonlinear Optics最新文献

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Low distortion laser welding of cylindrical components 圆柱形零件的低畸变激光焊接
International Conference on Coherent and Nonlinear Optics Pub Date : 2010-09-10 DOI: 10.1117/12.881008
Sonja Kittel
{"title":"Low distortion laser welding of cylindrical components","authors":"Sonja Kittel","doi":"10.1117/12.881008","DOIUrl":"https://doi.org/10.1117/12.881008","url":null,"abstract":"Automotive components are for the most part cylindrical and thus the weld seams are of radial shape. Radial weld seams are usually produced by starting at a point on the component's surface rotating the component resulting in an overlap zone at the start/end of the weld. In this research, it is shown that the component's distortion strongly depends on the overlap of weld start and end. A correlation between overlap zone and distortion is verified by an experimental study. In order to reduce distortion generated by the overlap zone a special optics is used which allows shaping the laser beam into a ring shape which is then focused on the cylindrical surface and produces a radial ring weld seam simultaneously by one laser pulse. In doing this, the overlap zone is eliminated and distortion can be reduced. Radial weld seams are applied on precision samples and distortion is measured after welding. The distortion of the precision samples is measured by a tactile measuring method and a comparison of the results of welding with the ring optics to reference welds is done.","PeriodicalId":309922,"journal":{"name":"International Conference on Coherent and Nonlinear Optics","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124091456","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
Statistical characteristics of spatial fluctuations in intensity of dispersed laser beams 分散激光束强度空间波动的统计特性
International Conference on Coherent and Nonlinear Optics Pub Date : 2010-09-10 DOI: 10.1117/12.880927
V. Odintsov, O. M. Vokhnik
{"title":"Statistical characteristics of spatial fluctuations in intensity of dispersed laser beams","authors":"V. Odintsov, O. M. Vokhnik","doi":"10.1117/12.880927","DOIUrl":"https://doi.org/10.1117/12.880927","url":null,"abstract":"The statistical characteristics of spatial fluctuations of the intensity of dispersed laser beams are studied theoretically. The density of the probability distribution for the intensity is found and its transformation with a change in the longitudinal coordinate is studied. It is shown that a decrease in the intensity fluctuations and a drop in the contrast of the beam speckle structure occur with increasing distance from the initial plane in which the spatially inhomogeneous broadband field is assumed to be spatially coherent. A decrease in fluctuations is accompanied by an increase in the size of speckles in the direction of dispersion, as well as along the beam axis. An interpretation of the found regularities is given.","PeriodicalId":309922,"journal":{"name":"International Conference on Coherent and Nonlinear Optics","volume":"7994 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128754033","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
Low threshold Raman laser 低阈值拉曼激光器
International Conference on Coherent and Nonlinear Optics Pub Date : 2010-09-10 DOI: 10.1117/12.881830
M. G. Galushkin, K. Mitin, A. Seryogin
{"title":"Low threshold Raman laser","authors":"M. G. Galushkin, K. Mitin, A. Seryogin","doi":"10.1117/12.881830","DOIUrl":"https://doi.org/10.1117/12.881830","url":null,"abstract":"The geometry of Raman shifter with self-intersection of pumping beam is proposed. The generation of a Stokes wave takes place in a separate ring resonator with a non-linear parametric mirror. The spatial location of a ring resonator with respect to pumping waves has determined. For this geometry conditions of the phase matching and effective interaction of waves at different frequency mixing are realized. The scheme allows to essentially expand spectral range of SRS converters.","PeriodicalId":309922,"journal":{"name":"International Conference on Coherent and Nonlinear Optics","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130588400","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: 1
Dynamics of plasma production and harmonic generation under microchannel drilling in solid target by intense femtosecond laser 强飞秒激光在固体目标微通道钻孔下等离子体产生和谐波产生的动力学
International Conference on Coherent and Nonlinear Optics Pub Date : 2010-09-10 DOI: 10.1117/12.881882
V. M. Gordienko, I. Zhvaniya, A. S. Khomenko
{"title":"Dynamics of plasma production and harmonic generation under microchannel drilling in solid target by intense femtosecond laser","authors":"V. M. Gordienko, I. Zhvaniya, A. S. Khomenko","doi":"10.1117/12.881882","DOIUrl":"https://doi.org/10.1117/12.881882","url":null,"abstract":"The dynamic of SH spectra modifications during channel formation in a solid target by high-intensity fs-laser radiation (I ~ 1016 W/cm2) has been investigated. A significant broadening and blue shift of the spectra were found.","PeriodicalId":309922,"journal":{"name":"International Conference on Coherent and Nonlinear Optics","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129331317","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
Principal component analysis of UV-VIS-NIR transmission spectra of Moldavian matured wine distillates 摩尔多瓦成熟葡萄酒蒸馏液紫外-可见-近红外透射光谱的主成分分析
International Conference on Coherent and Nonlinear Optics Pub Date : 2010-09-10 DOI: 10.1117/12.881593
M. Khodasevich, D. Trofimova, Elena I. Nezalzova
{"title":"Principal component analysis of UV-VIS-NIR transmission spectra of Moldavian matured wine distillates","authors":"M. Khodasevich, D. Trofimova, Elena I. Nezalzova","doi":"10.1117/12.881593","DOIUrl":"https://doi.org/10.1117/12.881593","url":null,"abstract":"Principal component analysis of UV-VIS-NIR transmission spectra of matured wine distillates (1-40 years aged) produced by three Moldavian manufacturers allows to characterize with sufficient certainty the eleven chemical parameters of considered alcoholic beverages: contents of acetaldehyde, ethyl acetate, furfural, vanillin, syringic aldehyde and acid, etc.","PeriodicalId":309922,"journal":{"name":"International Conference on Coherent and Nonlinear Optics","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129954503","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: 1
KrF laser system with a wide range of wavelength tuning KrF激光系统具有宽范围的波长调谐
International Conference on Coherent and Nonlinear Optics Pub Date : 2010-09-10 DOI: 10.1117/12.879644
Y. Panchenko, V. Dudarev, I. Konovalov, V. Losev, A. Pavlinsky, A. Puchikin
{"title":"KrF laser system with a wide range of wavelength tuning","authors":"Y. Panchenko, V. Dudarev, I. Konovalov, V. Losev, A. Pavlinsky, A. Puchikin","doi":"10.1117/12.879644","DOIUrl":"https://doi.org/10.1117/12.879644","url":null,"abstract":"Development of KrF laser system for lidar designed for detection of the compound molecules containing a nitric oxide is presented. The system consists of the master oscillator and the amplifier operating at pulse repetition rate up to 100 Hz. Laser radiation having energy up to 0.2 J and bandwidth of 2 pm is smoothly tuned in a spectral range of 247.6-249.5 nm.","PeriodicalId":309922,"journal":{"name":"International Conference on Coherent and Nonlinear Optics","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127953377","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: 2
Different calibration strategies to overcome matrix effect in steel analysis by laser-induced breakdown spectroscopy 克服激光诱导击穿光谱分析中基体效应的不同校准策略
International Conference on Coherent and Nonlinear Optics Pub Date : 2010-09-10 DOI: 10.1117/12.881140
T. Labutin, A. Popov, I. V. Seliverstova, N. B. Zorov
{"title":"Different calibration strategies to overcome matrix effect in steel analysis by laser-induced breakdown spectroscopy","authors":"T. Labutin, A. Popov, I. V. Seliverstova, N. B. Zorov","doi":"10.1117/12.881140","DOIUrl":"https://doi.org/10.1117/12.881140","url":null,"abstract":"Strong effect of steel hardness on the parameters of laser-induced plasma (e.g., temperature) and on the calibration curves for manganese and chromium in steels has been demonstrated. The presence of the inverse correlation between the steel hardness and the excitation temperature determined by Mn I lines was explained by the confinement of laser plasma with the crater walls. A new calibration strategy based on the summation of intensities for several lines of the analyte allowed one to reduce the effect of matrix, caused by mechanical properties, on the determination of chromium and manganese in steels. The advantages of this strategy are discussed in the article in comparison with the wellestablished approaches, such as an internal standard and single analytical line.","PeriodicalId":309922,"journal":{"name":"International Conference on Coherent and Nonlinear Optics","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128827188","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: 4
Photon echo locking via inhomogeneous broadening controlled by a weak pulsed magnetic field and optical storage 由弱脉冲磁场和光存储控制的非均匀展宽光子回波锁定
International Conference on Coherent and Nonlinear Optics Pub Date : 2010-09-10 DOI: 10.1117/12.881031
D. Khristoforova, A. Kalachev, A. Shegeda
{"title":"Photon echo locking via inhomogeneous broadening controlled by a weak pulsed magnetic field and optical storage","authors":"D. Khristoforova, A. Kalachev, A. Shegeda","doi":"10.1117/12.881031","DOIUrl":"https://doi.org/10.1117/12.881031","url":null,"abstract":"Two-pulse photon echo in LiLuF4:Er3+ crystal subjected to a weak pulsed magnetic field is investigated. The dependence of the echo intensity on the magnetic field switching time is analyzed. Prospects for using photon echo modulation by a weak magnetic field for photon-echo-based storage are discussed.","PeriodicalId":309922,"journal":{"name":"International Conference on Coherent and Nonlinear Optics","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125506969","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
The collective elementary excitations of 2D magnetoexcitons in the BEC state with wave vector k=0 波矢量k=0时BEC态二维磁激子的集体初等激发
International Conference on Coherent and Nonlinear Optics Pub Date : 2010-09-10 DOI: 10.1117/12.881324
S. Moskalenko, M. A. Liberman, E. V. Dumanov
{"title":"The collective elementary excitations of 2D magnetoexcitons in the BEC state with wave vector k=0","authors":"S. Moskalenko, M. A. Liberman, E. V. Dumanov","doi":"10.1117/12.881324","DOIUrl":"https://doi.org/10.1117/12.881324","url":null,"abstract":"The energy spectrum of the collective elementary excitations of a 2D electrom-hole (e-h) system situated in a strong perpendicular magnetic field in a state of Bose-Einstein condensation (BEC) with wave vector k=0 was investigated in the frame of Bogoliubov theory of quasiaveraes. The starting Hamiltonian describing the e-h system contains not only the Coulomb interaction between the particles lying on the lowest Landau levels(LLLs), but also the supplementary interaction due to their virtual quantum transitions from the LLLs to the excited Landau levels and return back. This supplementary interaction generates after the averaging on the ground BCS-type state wave function the direct Hartree-type terms with attractive character, the exchange Fock-type terms giving rise to repulsion as well as the similar terms arising after the Bogoliubov u - v transformation. The interplay of these three parameters gives rise to the resulting different from zero interaction between the magnetoexcitons with wave vector k=0 and to stability of their BEC as regards the collapse. It influences also on the single particle energy spectrum as well as on the collective elementary excitations. It consists from six branches. Four of them are excitonic-type branches, two of them being of exciton origin whereas the second two are the quasienergy branches representing the mirror reflection of previous two branches. Another two branches are the optical and acoustical plasmon branches.","PeriodicalId":309922,"journal":{"name":"International Conference on Coherent and Nonlinear Optics","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126969796","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
Laser-based processes of ion implantation for Pt+/SiC gas sensor formation 激光离子注入Pt+/SiC气体传感器形成工艺研究
International Conference on Coherent and Nonlinear Optics Pub Date : 2010-09-10 DOI: 10.1117/12.881043
V. Fominski, A. Gnedovets, R. Romanov, M. Demin
{"title":"Laser-based processes of ion implantation for Pt+/SiC gas sensor formation","authors":"V. Fominski, A. Gnedovets, R. Romanov, M. Demin","doi":"10.1117/12.881043","DOIUrl":"https://doi.org/10.1117/12.881043","url":null,"abstract":"A relatively simple technique of high-energy ion implantation of the pulsed laser plasma under the influence of an external pulsed electric field is suggested. The developed mathematical model allows forecasting depth distribution of implanted atoms on the basis of experimental measurements of fundamental physical characteristics of the pulsed laser plasma and the technical parameters of high-voltage system. The possibility of implantation of platinum ions from laser plasma to create on-chip n-SiC hydrogen sensor for use in complicated conditions is demonstrated.","PeriodicalId":309922,"journal":{"name":"International Conference on Coherent and Nonlinear Optics","volume":"131 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114030808","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
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