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Optimization of parodontium tissue irradiation method for fluorescent diagnostic (FD) and photodynamic therapy (PDT) 乳牙组织荧光诊断(FD)和光动力治疗(PDT)照射方法的优化
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563222
Maria L. Sinyaeva, A. Mamedov, V. V. Lervkin, S. Kharnas, A. I. Volkova, V. Loschenov, Anatoly N. Berezin, G. Kiselev
{"title":"Optimization of parodontium tissue irradiation method for fluorescent diagnostic (FD) and photodynamic therapy (PDT)","authors":"Maria L. Sinyaeva, A. Mamedov, V. V. Lervkin, S. Kharnas, A. I. Volkova, V. Loschenov, Anatoly N. Berezin, G. Kiselev","doi":"10.1117/12.563222","DOIUrl":"https://doi.org/10.1117/12.563222","url":null,"abstract":"During the last several years research activities have been conducted to study PDT availability in stomatology for pathogenic microflora suppression, which presence causes different kinds of oral cavity inflammatory disease. Studies indicate that PDT can be alternative to traditional antibiotic therapy. We carried out research in order to determine the optimal method of tooth irradiation to provide necessary therapeutic radiation dose for affected parodontium tissue in case of inflammatory disease. These data can be used for fiber-optic catheter positioning for further influence on oral cavity nidus of inflammation during PDT and PD. 20 teeth ex vivo were examined. Teeth were irradiated with diode laser (680 nm). In different teeth regions laser radiation intensity was measured by LESA-01-Biospec spectrometer. Optimal radiation method for PDT and PD was found.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"106 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":"124779243","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
Welding of cobalt-iron-based amorphous alloy foils with Nd:YAG laser Nd:YAG激光焊接钴铁基非晶合金箔
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563218
D. Runčev, L. Dorn
{"title":"Welding of cobalt-iron-based amorphous alloy foils with Nd:YAG laser","authors":"D. Runčev, L. Dorn","doi":"10.1117/12.563218","DOIUrl":"https://doi.org/10.1117/12.563218","url":null,"abstract":"The paper presents research results of the welding of cobalt-iron-based amorphous alloy with Nd:YAG laser. The aim of the research was the production of a high quality welding joint, by preserving the amorphous structure. Amorphous alloy VAC 6025 [(CoFe)70(MoSiB)30] in the shape of foils with different thickness (0.025 and 0.030 mm) were overlapingspot welded. The quality fo the foils surface, by measuring of the roughness, measuring of the reflection from the surface of the foils and estimation of the absorption grade, were investigated as basic characteristics of the laser beam welding of amorphous alloy foils. The quality of the welded joints was tested by microstructure analysis with optical microscope and SEM and the micro hardness of the welded joints.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"216 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":"132238854","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
Vortices in femtosecond laser fields 飞秒激光场中的涡流
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563108
Kaloyan S. Bezuhanov, A. Dreischuh, Gerhard G. Paulus, Gerhard G. Paulus, M. Schaetzel, H. Walther
{"title":"Vortices in femtosecond laser fields","authors":"Kaloyan S. Bezuhanov, A. Dreischuh, Gerhard G. Paulus, Gerhard G. Paulus, M. Schaetzel, H. Walther","doi":"10.1117/12.563108","DOIUrl":"https://doi.org/10.1117/12.563108","url":null,"abstract":"We experimentally generate optical vortices in the output beam of Ti:Sapphire laser emitting 20-fs pulses. Screw phase dislocations are imposed in each spectral component of the short pulses by aligning computer-generated hologram within a 4f-setup.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"13 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":"123352877","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: 14
All-optical method and device for magnetic field measurement 一种全光磁场测量方法及装置
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563211
N. Petrov, T. Karaulanov, A. Yanev, B. Todorov, S. Cartaleva
{"title":"All-optical method and device for magnetic field measurement","authors":"N. Petrov, T. Karaulanov, A. Yanev, B. Todorov, S. Cartaleva","doi":"10.1117/12.563211","DOIUrl":"https://doi.org/10.1117/12.563211","url":null,"abstract":"Diode laser system with frequency modulation in the GHz region has been built. The two first sidebands of the frequency modulated laser spectrum are used for preparation of CPT resonances in 87Rb. The CPT resonance splitting in magnetic field is examined by registering the fluorescence or its first derivative in dependence on the modulation frequency. Measuring the frequency difference between the CPT resonances, the value of the magnetic field is determined.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"189 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":"116425672","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
Computer-generated holograms for photonic crystal fabrication 用于光子晶体制造的计算机生成全息图
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563214
S. Jivkova
{"title":"Computer-generated holograms for photonic crystal fabrication","authors":"S. Jivkova","doi":"10.1117/12.563214","DOIUrl":"https://doi.org/10.1117/12.563214","url":null,"abstract":"A novel approach to photonic crystal fabrication is proposed. It is based on the use of computer-generated holograms (CGHs) for photonic crystal structure definition. CGH allows for defining arbitrary structures, perfect or with any type of defect in a single lithographic step. CGH lithography is applicable to both 2D and 3D structures. Furthermore, a CGH can be made reconfigurable if a liquid crystal is used as a hologram medium. Hence, a single device can be used for fabrication of any photonic structure.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"23 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114050110","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
On-the-teeth whitening process using Ar+ and CuBr lasers 使用Ar+和cur激光的牙齿美白过程
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563143
S. Dimitrov, L. Raychev, A. Gisbrecht, Roumyana Todorovska, L. Petrov, Georgy C. Todorov
{"title":"On-the-teeth whitening process using Ar+ and CuBr lasers","authors":"S. Dimitrov, L. Raychev, A. Gisbrecht, Roumyana Todorovska, L. Petrov, Georgy C. Todorov","doi":"10.1117/12.563143","DOIUrl":"https://doi.org/10.1117/12.563143","url":null,"abstract":"The present investigations are directed at a more detailed studying of methods for colour determination aimed at estimation of human teeth whiteness degree, sufficiently handy for common use in clinical practice. In order to be obtained unbiased results of the whitening, specific techniques for the degree of whiteness (coloration) determination had been developed on the basis of common colorimetric and spectral methods and apparatus, including a standard computer processing and accorded to the three-dimensional colour scheme Vita 3D. Comparative experimental investigations with two lasers (Ar+, CuBr) and three experimental whitening compositions for treatment of 6 different groups of samples were carried out. The results of the applied spectral and colorimetric techniques are in a good agreement with those of the standard computer processing of the corresponding digital photographs and comply with the visually estimated degree of the teeth whiteness judged according to the standard reference scale commonly used in the aesthetic dentistry.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"3 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":"114056328","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
CW medium-power fiber lasers for near IR range 近红外连续波中功率光纤激光器
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563097
A. Kurkov, E. Dianov
{"title":"CW medium-power fiber lasers for near IR range","authors":"A. Kurkov, E. Dianov","doi":"10.1117/12.563097","DOIUrl":"https://doi.org/10.1117/12.563097","url":null,"abstract":"We present results of the research and development of the CW medium-power fiber lasers emitting in a range of 1-2 μm. Realized light sources are based on the application of rare-earth doped fibers and Raman converters pumped by semiconductor sources. A combination of the fiber lasers emitting at different wavelengths with Raman converters based on germanium or/and phosphorous fibers allows one to build a laser source emitting at any wavelength of near IR range. The reached quality of the fabricated fibers and optimization of reflecting Bragg gratings allowed us to demonstrate fiber lasers with a quantum efficiency closed to 90%. The fabricated lasers were used for a realization of Raman converters emitting at the various wavelengths.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"7 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":"121194194","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
The configuration of industrial laser equipment: selection and synthesis 工业激光设备的配置:选型与综合
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563219
R. Zhuk, Leonid M. Oleschuk
{"title":"The configuration of industrial laser equipment: selection and synthesis","authors":"R. Zhuk, Leonid M. Oleschuk","doi":"10.1117/12.563219","DOIUrl":"https://doi.org/10.1117/12.563219","url":null,"abstract":"The choice of proper configuration of laser technological equipment is one of the main stages of the development of technological process. The rational choice of movements that laser beam and work piece perform greatly improves the efficiency of laser processing and significantly reduces costs of the operation being developed. For this purpose all possible ways of laser beam delivery and workpiece manipulation were analyzed. There were used different coordinate systems and responsible movements along each axis. An algorithm was developed to generate all possible connections between modules of laser system. On a basis of this algorithm we have developed a software that optimizes the process of the selection of laser equipment by implementing the requirements to it. A software could be extended by using additional economical and constructional factors that may influence on the required laser equipment configuration. For each coordinate system there were made schemes of laser equipment with responsible movements indicated.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"9 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":"128543771","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
Computer biomodeling and laser stereolithography 计算机生物建模和激光立体光刻
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563109
A. Evseev, S. Kamaev, E. V. Kotsuba, M. Markov, M. Novikov, V. Panchenko, V. Popov
{"title":"Computer biomodeling and laser stereolithography","authors":"A. Evseev, S. Kamaev, E. V. Kotsuba, M. Markov, M. Novikov, V. Panchenko, V. Popov","doi":"10.1117/12.563109","DOIUrl":"https://doi.org/10.1117/12.563109","url":null,"abstract":"This paper presents the results of works of ILIT RAS on introduction of computer biomodeling and laser stereolithography into medicine practice, and the results of the experiments on 1) rapid manufacture of plastic copies of fragments of the human skeleton; 2) creation of computer models of implants for maxillofacial surgery, fabrication of their plastic copies and moulds for fabrication of implants from biocompatible materials; 3) direct fabrication of biocompatible and bioactive implants for substitution of bone tissue defects.","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":"131218057","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: 5
Transceiver design for MSD indoor free-space laser links MSD室内自由空间激光链路收发器设计
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563200
S. Jivkova, B. Hristov
{"title":"Transceiver design for MSD indoor free-space laser links","authors":"S. Jivkova, B. Hristov","doi":"10.1117/12.563200","DOIUrl":"https://doi.org/10.1117/12.563200","url":null,"abstract":"In Multi-Spot Diffusing (MSD) configuration, the communication channel can be considered virtually ideal at data rates of hundreds of Mbps. Thus, the main concern is power efficiency. We propose transceiver optical designs that allow for a reconfigurable transmitter output and independent communication channels. Transmitter employs multiple light sources that can be turned on and off independently. This way, optical signal is provided only where it is needed, which optimizes power usage. Receiver utilizes an imaging optical system and segmented photodetector, thus performing direction diversity reception. We show that when maximum ratio combining is employed for the electric signals processing and power efficient modulation schemes like L-PPM are used significant power savings can be obtained.","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":"130103487","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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