发布求助
文献互助 智能选刊 最新文献

International Conference on Laser and Laser Information Technologies最新文献

筛选
英文 中文
Measurements of wavefront distortions of optical radiation using a shadow method 用阴影法测量光辐射的波前畸变
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563105
V. Bredikhin, S. P. Kuznetsov
{"title":"Measurements of wavefront distortions of optical radiation using a shadow method","authors":"V. Bredikhin, S. P. Kuznetsov","doi":"10.1117/12.563105","DOIUrl":"https://doi.org/10.1117/12.563105","url":null,"abstract":"The technique for measuring wave front distortions in optical elements by the shadow method is developed. Shadow pictures obtained for mutually perpendicular orientations of the Foucault knife-edge are the distributions of components of the gradient of the function describing the wave front relief, so that its shape can be restored by means of integration. An example of measurements of wave front distortions in large-scale optical KDP crystal elements employing the IAB 451 device is given.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127687582","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
Polarization holographic gratings with surface relief in azobenzene-containing polymers 含偶氮苯聚合物中具有表面起伏的偏振全息光栅
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563086
I. Mancheva, G. Martínez-Ponce, S. Calixto, T. Petrova, N. Tomova, V. Dragostinova, L. Nikolova
{"title":"Polarization holographic gratings with surface relief in azobenzene-containing polymers","authors":"I. Mancheva, G. Martínez-Ponce, S. Calixto, T. Petrova, N. Tomova, V. Dragostinova, L. Nikolova","doi":"10.1117/12.563086","DOIUrl":"https://doi.org/10.1117/12.563086","url":null,"abstract":"Polarization holographic gratings in azopolymers are due to three photoinduced effects: linear anisotropy, circular anisotropy, and surface relief. In our polymers the surface relief grating is with doubled frequency with respect to the volume anisotropic grating. A theoretical analysis is presented and compared with experimental data.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114090252","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
Dynamics of a green upconversion-pumped Er:YAG laser exhibiting reabsorption losses 显示重吸收损失的绿色上转换泵浦Er:YAG激光器动力学
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563132
O. Toma, S. Georgescu
{"title":"Dynamics of a green upconversion-pumped Er:YAG laser exhibiting reabsorption losses","authors":"O. Toma, S. Georgescu","doi":"10.1117/12.563132","DOIUrl":"https://doi.org/10.1117/12.563132","url":null,"abstract":"In this paper we model the dynamical behavior of a green-emitting upconversion-pumped Er(0.5 at.%):YAG laser, using the rate equations. An important peculiarity of this laser is the reabsorption of laser radiation by the parasitic 4I13/2→2H29/2 excited-state absorption process. This process represents a supplementary intensity-dependent loss mechanism that can, in certain conditions, produce self-pulsing behavior of the Er:YAG laser. Stability analysis is used to identify the various regimes of laser emission and the bifurcations leading to them. The results are illustrated by Runge-Kutta integration of the rate equations for values of control parameters corresponding to various laser emission regimes. The model can be applied for the prediction and enhancement of the performances of the green Er3+ upconversion lasers.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123006745","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 refractometry of edible films 可食用薄膜的激光折射测定
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563090
I. Panchev, K. Nikolova, S. Sainov
{"title":"Laser refractometry of edible films","authors":"I. Panchev, K. Nikolova, S. Sainov","doi":"10.1117/12.563090","DOIUrl":"https://doi.org/10.1117/12.563090","url":null,"abstract":"Refraction index of edible films from polysaccharides (pectin, xanthan, carboxy-methyl-cellulose, polymixan) has been investigated using laser microrefractomeeter, constructed by the authors. Experimental data about the optical density and the thickness of the edible films have been obtained. The results from the investigation can be used in the development of new packing technologies for food products.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122121413","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
Study of new linear laser injection-locking amplifier of rectangular information pulses 新型矩形信息脉冲线性激光注入锁定放大器的研究
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563194
A. Boyadzhieva, M. Nenchev
{"title":"Study of new linear laser injection-locking amplifier of rectangular information pulses","authors":"A. Boyadzhieva, M. Nenchev","doi":"10.1117/12.563194","DOIUrl":"https://doi.org/10.1117/12.563194","url":null,"abstract":"We present a further development of the proposed by us an injection-locking technique for all-optical and high gain (~103-106) amplification of a periodically modulated (PM) intensity, low power (~μW), laser radiation. The problem that limits the use of standard injection locking optical amplifier is to obtain a linear response to the PM injection. We have solved this problem by introducing a competitive CW injection in appropriate ring and linear schemes and have carried out previously the detailed consideration for the sinus low modulated radiation. Here we report the application of our original technique for amplification of information sequences of rectangular pulses. The amplifier operation is modeled with the rate differential equations system. We have shown the applicability of the proposed technique for amplification of pulses with repetition rate more than 40 MHz and in special conditions-to approximately 128 MHz without loss of the information capability. The pumping is with 100-250 MHz mode locked Nd:YAG laser (0.53 μm harmonic). The consideration is on the example of Rhodamin 6G dye laser. The pulses with peak power of 0.1μ W to 200 μW are amplified by factor of 109-106 (to more than 2000 W).","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130561366","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
Experimental investigations of the laser cladding of protective coatings on preheated base material 预热基材激光熔覆防护涂层的实验研究
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563217
R. Jendrzejewski, G. Śliwiński, A. Conde, C. Navas, J. D. de Damborenea
{"title":"Experimental investigations of the laser cladding of protective coatings on preheated base material","authors":"R. Jendrzejewski, G. Śliwiński, A. Conde, C. Navas, J. D. de Damborenea","doi":"10.1117/12.563217","DOIUrl":"https://doi.org/10.1117/12.563217","url":null,"abstract":"The laser cladding technique was applied to obtain Co-based stellite SF6 coatings on the chromium steel base. The coatings were prepared by means of a direct cladding of metal powder using a 1.2 kW cw CO2 laser stand with a controlled preheating of the substrate material. Results of the metallographic tests revealed a fine-grained, dendritic microstructure and proper metallic bonding between substrate and coating. A nearly constant concentration of mian elements at different areas of the coating cross-section indicated on homogeneous chemical composition of the laser-cladded SF6 alloy samples. A significant decrease of the micro-crack number with increasing temperature of the base preheating was observed. This was accompanied by a drop of the wear and corrosion resistance.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131117688","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
Laser-assisted tympanostomy (LAT) in adult individuals 成人激光辅助鼓膜造口术(LAT)
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563283
E. Prokopakis, V. Lachanas, E. Helidonis, G. Velegrakis
{"title":"Laser-assisted tympanostomy (LAT) in adult individuals","authors":"E. Prokopakis, V. Lachanas, E. Helidonis, G. Velegrakis","doi":"10.1117/12.563283","DOIUrl":"https://doi.org/10.1117/12.563283","url":null,"abstract":"Objectives: To assess outcome, in adult individuals undergone Laser Assisted Tympanostomy (LAT) without ventilation tube placement. Method: LAT was performed on a total of 95 ears (72 individuals). Indications included serous otitis media with effusion (44 ears/31 patients), eustachian tube dysfunction (32 ears/24 patients), acute otitis media (13 ears/11 patients), and endoscopic visualization of the middle ear (6 ears/6 patients). Results: Middle ear disease was resolved after the closure of tympanostomy in 48% of patients with serous otitis media with effusion. In 78% of patients with Eustachian tube dysfunction symptoms were diminished. All patients with acute otitis media had a satisfactory outcome. LAT was found quite effective in patients undergoing middle ear endoscopy. Conclusion: LAT without ventilation tubes provides a safe alternative surgical option in adult patients in certain cases. The selection criteria for this procedure are addressed in detail.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"863 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120978438","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
Development of diode-pumped Yb3+:doped crystal lasers for application in spectroscopy and metrology: two-wavelength and single-mode operation 用于光谱学和计量学的二极管泵浦掺镱晶体激光器的研制:双波长和单模操作
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563101
J. Wallerand, Y. Louyer, M. Himbert, M. Deneva, M. Nenchev
{"title":"Development of diode-pumped Yb3+:doped crystal lasers for application in spectroscopy and metrology: two-wavelength and single-mode operation","authors":"J. Wallerand, Y. Louyer, M. Himbert, M. Deneva, M. Nenchev","doi":"10.1117/12.563101","DOIUrl":"https://doi.org/10.1117/12.563101","url":null,"abstract":"We demonstrate and investigate (theory, experiment) a peculiar mode of cw Yb3+:doped crystal laser operation when two emissions, at two independently tunable wavelengths, are simultaneously produced. Both emissions are generated from a single pumped volume and take place either in a single beam or in spatially separated beams. The laser employs original two-channel cavities that use a Passively Self-Injection Locking (PSIL) control to reduce the intracavity losses or a very simple for practical realization two near collinear channels cavity. A two-wavelength, single, longitudinal mode generation is also obtained. The results reported are based on the example of Yb3+:GGG laser and Yb3+:YAH laser. The lasers operate in the range 1023-1033 nm and 1030-1040 nm, respectively with a total output power of ~0.4 W.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126868798","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
Conditions for the dynamic control of the focusing properties of the high-power CW CO2 laser beam in a system with an adaptive mirror 研究了自适应反射镜系统中大功率连续波CO2激光束聚焦特性动态控制的条件
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563124
G. Rabczuk, M. Sawczak
{"title":"Conditions for the dynamic control of the focusing properties of the high-power CW CO2 laser beam in a system with an adaptive mirror","authors":"G. Rabczuk, M. Sawczak","doi":"10.1117/12.563124","DOIUrl":"https://doi.org/10.1117/12.563124","url":null,"abstract":"A mirror with a controllable focal length designed for the high power cw CO2 industrial laser was integrated into the laser beam guiding system in order to verify conditions for the dynamic control of the laser beam focusing properties. The ability of the mirror to correct the thermal distortions in the laser output window was investigated by measuring the beam characteristics versus the mirror shape at different conditions of the laser operation defined by the output power level. The experimental tests prove that the mirror enables dynamic adjustments of the laser beam diameters at the focusing optics and in consequence the control of the focused beam parameters.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121389101","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
Laser-induced fluorescence studies of caries model 激光诱导荧光龋模型的研究
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563142
E. Borisova, T. Uzunov, L. Avramov
{"title":"Laser-induced fluorescence studies of caries model","authors":"E. Borisova, T. Uzunov, L. Avramov","doi":"10.1117/12.563142","DOIUrl":"https://doi.org/10.1117/12.563142","url":null,"abstract":"The goal of this study is fluorescence investigations in the process of caries growth in presence of bacteria metabolism products. Spectra of teeth, illuminated with 337 nm nitrogen laser were measured during in vitro caries formation. Spectra, obtained from sound tooth consist of one intensive peak at 480-500 nm and one secondary peak at 430-450 nm. In the process of the caries formation of the teeth we observed increase in intensity at 430-450 nm and appearance of two peaks in the red spectral region at 590-650 nm. A general decrease in the intensity of the fluorescence signal is observed, but changes in spectral shape are more significant. We observe that the peak increase at 430-450 nm is related to the tooth demineralization. Bacteria presence and their metabolism products induce fluorescence signal in the red region. These results allow consideration of caries in terms of two different processes, which lead to its formation: demineralization and metabolism products increase, which are caused by bacteria activities, and could be used to obtain a more complete picture of caries formation.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124379086","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信