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International Conference on Laser and Laser Information Technologies最新文献

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Universal power meter of light radiation for optical fiber and photodiodes 用于光纤和光电二极管的光辐射通用功率计
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563177
K. Linkov, V. Loschenov, M. Taraz
{"title":"Universal power meter of light radiation for optical fiber and photodiodes","authors":"K. Linkov, V. Loschenov, M. Taraz","doi":"10.1117/12.563177","DOIUrl":"https://doi.org/10.1117/12.563177","url":null,"abstract":"Using scattering of light in Teflon as a scattering element, a new method for measuring power of light radiation of face and cylindrical fibers and photodiodes has been developed. A compact device for measurement has been built, suitable for mass production.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"5449 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":"129555386","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
Recent developments in laser material processing 激光材料加工的最新进展
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563201
V. Kovalenko
{"title":"Recent developments in laser material processing","authors":"V. Kovalenko","doi":"10.1117/12.563201","DOIUrl":"https://doi.org/10.1117/12.563201","url":null,"abstract":"First research in laser technology had been initiated at the beginning of 60th of the last century. Since then great achievements had been gained in different laser types development, understanding of laser beams interaction with matter, simulation of the processes, development of wide range of operations of material processing and different devices to monitor the working conditions. In spite of unique results obtained in very short historic period this dynamic technology has still a lot of problems to be solved. Lasers itself had to be more efficient transformers of energy, the range of wavelength had to be broaden both in far infrared region and to near ultra violet and X-ray fields. Laser systems must be more compact and versatile, equipped with the whole variety of control and monitoring devices for the processing. Still needs the solution the problem of development the fast and precise techniques for non-destruction testing of processing results. As nearest and further prospects in laser technology it is possible already to expect the advent of more sophisticated type of laser with possibilities to change in wide range both wavelength of radiation and duration of the pulses. It will be simpler to get very short and ultra short pulses and to use them for the realization of different processes based on material ablation. High power CW highly efficient laser will be developed and implemented into industry. Many new hybrid laser processing may appear with wide integration of information technologies. The main goal in further laser processing development will be the achievement of higher quality of the product at possibly lower cost, improvement in maintaining of the laser systems and increasing their reliability.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"38 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":"131157438","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
Advances in development of chemical oxygen-iodine laser 化学氧碘激光器的研究进展
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563099
J. Kodymová
{"title":"Advances in development of chemical oxygen-iodine laser","authors":"J. Kodymová","doi":"10.1117/12.563099","DOIUrl":"https://doi.org/10.1117/12.563099","url":null,"abstract":"The contribution deals with three investigated problems on Chemical Oxygen-Iodine Laser (COIL) and utilization of the results in advanced COIL development and advanced techniques connected with the COIL. These problems are following i) A gain modulation on the laser transition in iodine atom, I(2P1/2)-(2P3/2), by an external magnetic field, and its utilization for the COIL output power stabilization, ii) The evaluation of the Einstein A-coefficient of singlet oxygen, O2(1Δg), and utilization of this coefficient in the advanced diagnostics for O2(1Δg) determination in a laser pumping, and iii) A development of the advanced COIL using a chemically driven iodine atom delivery system, and a confrontation of advantages of this system with disadvantages of conventional source of atomic iodine via dissociated molecular iodine. Examples of few recent experimental results are presented.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"44 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":"133167528","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
Processes of quenching of 4,3He(21S, 21P) states in He+N2 mixture He+N2混合物中4,3He(21S, 21P)态的淬火过程
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563198
E. Dimova, G. Petrov, K. Blagoev
{"title":"Processes of quenching of 4,3He(21S, 21P) states in He+N2 mixture","authors":"E. Dimova, G. Petrov, K. Blagoev","doi":"10.1117/12.563198","DOIUrl":"https://doi.org/10.1117/12.563198","url":null,"abstract":"The quenching process of He (21S, 21P) states by collisions with nitrogen molecules in a He+N2 mixture at low pressure is experimentally investigated by a time-resolved spectroscopy method combined with pulse electron excitation. The influence of nitrogen atoms in quenching process is taken into account. The rate constants and corresponding cross sections for quenching 4He(21S), 4He(21P), 3He(21S) and 3He(21P) states by collisions with ground state N2 molecules at Tg=600 K are: k[4He(21S)] = (2.7±0.1)x10-10 cm3s-1, k[4He(21P)] = (1.9±0.3)x10-9 cm3s-1, k[3He(21S)] = (2.8±0.1)x10-10 cm3s-1, and k[3He(21P)] = (3.2±0.6)x10-9 cm3s-1 and σ[4He(21S)] = (14.2±0.5)x10-16 cm2, σ[4He(21P)] = (100±16)x10-16 cm2, σ[4He(21S)] = (12.7±0.5)x10-16 cm2, and σ[4He(21P)] = (145±27)x10-16 cm2.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"1 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":"130054523","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
Phase-conjugate mirror at stimulated Brillouin scattering with feedback for excimer lasers radiation 准分子激光辐射受激布里渊散射反馈相位共轭镜
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563113
M. G. Galushkin, K. Mitin, A. Seryogin, D. Zelenin
{"title":"Phase-conjugate mirror at stimulated Brillouin scattering with feedback for excimer lasers radiation","authors":"M. G. Galushkin, K. Mitin, A. Seryogin, D. Zelenin","doi":"10.1117/12.563113","DOIUrl":"https://doi.org/10.1117/12.563113","url":null,"abstract":"It is theoretically shown, that the Brillouin laser of the conjugated wave allows expanding abilities of PC at SBS for excimer lasers broadband radiation. The optical arrangements and nonlinear media for PC at SBS with a feedback of excimer lasers radiation are offered.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"25 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":"114219188","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
Lasers and hard-tissue interactions 激光和硬组织的相互作用
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563114
M. Makropoulou, E. Papagiakoumou
{"title":"Lasers and hard-tissue interactions","authors":"M. Makropoulou, E. Papagiakoumou","doi":"10.1117/12.563114","DOIUrl":"https://doi.org/10.1117/12.563114","url":null,"abstract":"The hard tissue laser ablation and the relevant laser applications on dental tissues have attracted several investigators, since the ablation efficiency, the lateral thermal and/or mechanical damage and the final surface characteristics must be optimised, in order to fulfil the efficient and safe removal of pathological dental areas in a clinical environment. For example, it was theoretically predicted that the lateral tissue thermal damage might be limited when the laser intensity is high and the interaction time is short. In this case the Q-switched Er:YAG laser operating with a pulse length below the thermal relaxation time of the irradiated tissue, is considered to be very effective. Therefore, the efficacy of the Q-switched Er:YAG laser, versus the free-running operation mode, on dentine ablation was studied, as well as the morphological changes at the irradiated dentine surface. Additionally, the interaction of nanosecond UV laser pulses and IR/visible picosecond laser pulses with hard tissue samples was investigated for comparative evaluation of the different laser ablation mechanisms.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"1 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":"116230591","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
A laser-spectroscopy complex for fluorescent diagnostics and photodynamic therapy of age-related macula degeneration 用于荧光诊断和光动力治疗老年性黄斑变性的激光光谱复合物
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563116
S. Shevchik, G. A. Meerovich, M. Budzinskaya, N. A. Ermakova, S. Kharnas, V. Loschenov
{"title":"A laser-spectroscopy complex for fluorescent diagnostics and photodynamic therapy of age-related macula degeneration","authors":"S. Shevchik, G. A. Meerovich, M. Budzinskaya, N. A. Ermakova, S. Kharnas, V. Loschenov","doi":"10.1117/12.563116","DOIUrl":"https://doi.org/10.1117/12.563116","url":null,"abstract":"A laser-spectroscopy complex was developed for fluorescent diagnostics and photodynamic therapy of age related macula degeneration using the Russian photosensitizer Photosense. The complex is based on slit lamp which was additionally equipped with an optical adapter, and the video adapter allows to combine the procedure of photodynamic therapy and the control of its carrying in the frame work of one procedure. The sensitivity and spatial resolution of the complex were investigated using a special test object. The availability of the developed complex and Photosense itself was examined on experimental animals.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"150 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":"123778287","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
Developing system for delivery of optical radiation in medicobiological researches 医学生物学研究中光辐射传输系统的研制
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563176
V. Loschenov, M. Taraz
{"title":"Developing system for delivery of optical radiation in medicobiological researches","authors":"V. Loschenov, M. Taraz","doi":"10.1117/12.563176","DOIUrl":"https://doi.org/10.1117/12.563176","url":null,"abstract":"Methods of optical diagnostics and methods of photodynamic therapy are actively used in medico-biological researches. The system for delivery of optical radiation is one of the key methods in these researches. Usually these systems use flexible optical fibers with diameters from 200 to 1000 micron. Two types of systems for delivery are subdivided, first for diagnostic researches, second for therapeutic procedures. Existing diagnostic catheters, which have most widely applied in medicine, have bifurcated with diameter of the tip equal 1.8 mm. These devices, which are called fiber-optical catheters, satisfy the majority endoscopes researches. However, till now the problem of optical-diagnostics inside tissue is not soled. Especially it is important at diagnostics of a mammary gland, livers, thyroid glands tumor, tumor of a brain and some other studies connected with punctures. In these cases, it is necessary that diameter of fiber-optical catheters be less than one millimeter. This work is devoted to the development of these catheters. Also in clinical procedures such as photodynamic therapy (PDT) and interstitial laser photocoagulation (ILP), cylindrical light diffusing tips are rapidly becoming a popular device for the administration of the desired light dose for the illumination of hollow organs, such as bronchus, trachea and oesophagus. This work is devoted to the development of these catheters.","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":"117074633","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
In vitro cytotoxicity assessment of [5,10,15,20-tetra (4-sulfophenyl) porphyrin] on tumor and nontumor cell lines [5,10,15,20-四(4-巯基)卟啉]对肿瘤和非肿瘤细胞系的体外细胞毒性评价
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563137
R. Alexandrova, O. Sabotinov, E. Stoykova, R. Ion, Stanislav Shurulinkov, G. Minchev
{"title":"In vitro cytotoxicity assessment of [5,10,15,20-tetra (4-sulfophenyl) porphyrin] on tumor and nontumor cell lines","authors":"R. Alexandrova, O. Sabotinov, E. Stoykova, R. Ion, Stanislav Shurulinkov, G. Minchev","doi":"10.1117/12.563137","DOIUrl":"https://doi.org/10.1117/12.563137","url":null,"abstract":"In this study we evaluate the cytotoxicity of 5,10,15,20- tetra (4-sulfophenyl) porphyrins on a tumor cell line LSCC-SF-Mc29, obtained from a transplantable chicken hepatoma induced by the myelocytomatosis virus Mc29, a timor line LSR-SF-SR, obtained from a transplantable sarcoma in rat induced by Rous sarcoma virus strain Schmidt-Ruppin and for normal mouse cell line (BALB/c-3T3-A31) and bovine kidney cell line (MDBK). The cells were exposed to irradiation from a pulsed CuBr vapor laser system at 510.6 nm and 578.2 nm at fluence rate 50 mW/cm2 and pulse frequency rate 20 kHz. The viability of cells was determined by the neutral red uptake cytotoxicity assay. The light dose-response curves and light exposures that ensure viability drop to 50 % were obtained for each cell line. The cytotoxic effect of TS4PP is most distinguished for LSCC-SF-Mc29. The bovine cell line is more vulnerable than the mouse line, especially at 510.6 nm. The 2-4 times higher viability of the normal cell lines in comparison with the tumor lines has been obtained.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"24 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":"126651218","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: 6
Transport of aqueous solutions in laser-irradiated biological tissues 激光辐照生物组织中水溶液的输运
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563174
A. Omel’chenko, E. Sobol, V. Bagratashvili, N. Ignatieva, M. V. Tarasov, V. V. Lunin
{"title":"Transport of aqueous solutions in laser-irradiated biological tissues","authors":"A. Omel’chenko, E. Sobol, V. Bagratashvili, N. Ignatieva, M. V. Tarasov, V. V. Lunin","doi":"10.1117/12.563174","DOIUrl":"https://doi.org/10.1117/12.563174","url":null,"abstract":"Kinetics of water diffusion in laser-irradiated cartilage and cornea was studied. Optical polarization analysis was applied for visualizing of aqueous solution diffused through laser-irradiated biological tissues. Diffusion coefficients of different physiological solutions in cartilage and cornea were measured.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"2 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":"116927962","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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