{"title":"Application of low-intensity laser in the treatment of Herpes simplex recidivans","authors":"T. Uzunov, T. Uzunov, R. Grozdanova","doi":"10.1117/12.563223","DOIUrl":"https://doi.org/10.1117/12.563223","url":null,"abstract":"We made our aim to investigate the effect of the low intensive laser with λ=630 nm in the visible red spectrum of light at Herpes simplex treatment. For this purpose we carried out a clinical research upon 62 persons with Herpes simplex lesions which have been divided into two groups of 31 persons. At the first group the effect of laser with power density 100 mW/cm2 ± 5 mW/cm2 and time of exposure 3 min. on field was traced out. At the second group the low intensive laser with the same characteristics has been used but in combination with the patent medicine Granofurin H as a photosensibilizer. The clinical approbations of this method showed high therapeutical effectiveness. The obtained results showed that at both groups there is an expressed anaesthetic, anti-inflammatory and regeneration stimulating effect and at the second group with the use of Granofurin H the reconvalescent period is shorter.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"33 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":"123710759","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}
C. Andreeva, G. Bevilacqua, V. Biancalana, E. Breschi, S. Cartaleva, Y. Dancheva, T. Karaulanov, C. Marinelli, E. Mariotti, L. Moi
{"title":"Coherent spectroscopy in Cs for precise magnetic field measurements","authors":"C. Andreeva, G. Bevilacqua, V. Biancalana, E. Breschi, S. Cartaleva, Y. Dancheva, T. Karaulanov, C. Marinelli, E. Mariotti, L. Moi","doi":"10.1117/12.563191","DOIUrl":"https://doi.org/10.1117/12.563191","url":null,"abstract":"Investigation on coherent population trapping and electromagnetic induced absorption effects has been made in Cs vapors. A detailed analysis of degenerate and non-degenerate cases is reported. Possible application to precise magnetic field measurements is discussed and preliminary results described.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"102 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":"115445903","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}
S. Malandrakis, E. Prokopakis, M. Sidoris, A. Karatzanis, G. Velegrakis, E. Helidonis
{"title":"Endoscopic laser arytenoidectomy with the use of CO2 laser","authors":"S. Malandrakis, E. Prokopakis, M. Sidoris, A. Karatzanis, G. Velegrakis, E. Helidonis","doi":"10.1117/12.563279","DOIUrl":"https://doi.org/10.1117/12.563279","url":null,"abstract":"Upper airway obstruction due to bilateral vocal cord paralysis presents a serious challenge to the Otolaryngologist. Various surgical techniques have been advocated for the management of patients with vocal cord patients with vocal cord paralysis. Among these techniques, the individual use of laser CO2 arytenoidectomy and posterior cordotomy has gained wide acceptance. In this report, we describe our experience in the management of bilateral vocal cord paralysis by combining posterior partial cordotomy as described by Dennis and Kashima with total arytenoidectomy as described by Ossoff. We report the long term results in the management of 24 patients with bilateral vocal cord paralysis treated in our Department during the last 9 years.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"329 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":"122330220","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}
{"title":"Laser security systems","authors":"I. Kolev, I.S. Stoeva","doi":"10.1117/12.563122","DOIUrl":"https://doi.org/10.1117/12.563122","url":null,"abstract":"This report presents the development of single-beam barrier laser security system. The system utilizes the near infrared (IR) range λ=(850÷900)nm. The security system consists of several blocks: Transmitter; Receiver; Logical Unit; Indication; Power Supply. There are four individually software programmable security zones Z1 ÷ Z4. The control logic is implemented on a PIC16F84 MCU. The infrared beam is a pulse pack, coded and modulated in the transmitter with frequency of 36 kHz. The receiver demodulates and decodes the beam. The software for the MCU is developed along with the electrical circuits of the security system.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"108 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":"124235744","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}
{"title":"Pulsed laser deposition of ZnO: comparison between deposition from Zn and ZnO target","authors":"J. Bruncko, M. Michalka, F. Uherek","doi":"10.1117/12.563094","DOIUrl":"https://doi.org/10.1117/12.563094","url":null,"abstract":"ZnO thin layers are promising materials for near UV emission and absorption optical devices, mainly for its relatively wide band gap (3.4 eV at 4.2 K). However, the problems with the optimal growth of the ZnO thin layer depositions are not satisfactory solved. The aim of this study was to compare differences between the layers deposited from the pure Zn target and the target from sintered ZnO. The growth of ZnO thin layers was performed on sapphire substrate under various conditions. The layers were prepared by the pulsed laser deposition using THG Nd:YAG laser at 355 nm. Characteristics of the layers were examined using the methods of atomic force microscopy, scanning electron microscopy and energy dispersive x-ray microanalyses.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"27 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":"121420730","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}
M. Plimmer, T. Badr, S. Guérandel, Y. Louyer, Sylvestre Challemel du Rozier, P. Juncar, M. Himbert, J. Silver, F. Biraben, F. Nez, G. Hagel
{"title":"Progress towards optical frequency standards based on two-photon transitions in atomic silver","authors":"M. Plimmer, T. Badr, S. Guérandel, Y. Louyer, Sylvestre Challemel du Rozier, P. Juncar, M. Himbert, J. Silver, F. Biraben, F. Nez, G. Hagel","doi":"10.1117/12.566996","DOIUrl":"https://doi.org/10.1117/12.566996","url":null,"abstract":"We report advances towards the development of frequency standards based on narrow two-photon transitions in the silver atom at 576 and 661 nm from the ground 4d105s2S1/2 state to the 2D3/2,5/2 levels of the configuration 4d95s2. We describe detection schemes for metastable atoms, localisation of the position of the metastable 2D5/2 level and diode-pumped Nd:YLF lasers around 1.3 μm destined to replace dye lasers for both cooling and spectroscopy of the clock transition. Our result for the position of the 2D5/2 level is more than a factor of two improvement over previous vales.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"21 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":"128195561","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}
G. Alzetta, S. Cartaleva, S. Gozzini, T. Karaulanov, A. Lucchesini, C. Marinelli, L. Moi, K. Nasyrov, V. Sarova
{"title":"Lossless formation of electromagnetically induced transparency in sodium atoms","authors":"G. Alzetta, S. Cartaleva, S. Gozzini, T. Karaulanov, A. Lucchesini, C. Marinelli, L. Moi, K. Nasyrov, V. Sarova","doi":"10.1117/12.563180","DOIUrl":"https://doi.org/10.1117/12.563180","url":null,"abstract":"In this paper we propose a simple method for eliminating the population losses of MC resonances by involving all atoms of the Na ground state in the formation of the narrow coherent resonances observed in the fluorescence when scanning around zero value the applied magnetic field. As a result, dark resonances with a contrast up to 100% have been observed. Results are obtained in two different experimental configurations: using laser excitation of linear and circular polarization, leading to different population redistribution among Zeeman and hf levels. Theoretical analysis of the results is also presented. It is shown that at certain conditions complete optical pumping of atoms to levels Fg=2, mFg=2 or mFg=-2 can be achieved, which means complete orientation of the atoms.","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":"132875168","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}
V. Panchenko, I. I. Berishvili, Victor V. Vasiltsov, Valerii A. Ulyanov, E. Egorov, A. Solovjev, A. Semenov, M. Tarasov, M. A. Roshin
{"title":"The lasers for TMLR application","authors":"V. Panchenko, I. I. Berishvili, Victor V. Vasiltsov, Valerii A. Ulyanov, E. Egorov, A. Solovjev, A. Semenov, M. Tarasov, M. A. Roshin","doi":"10.1117/12.563178","DOIUrl":"https://doi.org/10.1117/12.563178","url":null,"abstract":"The paper presents the analysis of the requirements to the laser systems used to cure the ischemic disease of the heart by the method of transmyocardial laser revascularization (TMLR). Among the medical laser systems under discussion (solid-state Nd:YAG, Er:YAG, Ho:YAG, excimer lasers, etc.) the high-power CO2 laser with pulse energy to 40 J is most suited to produce channels in the heart muscle. The paper provides the description and the technical characteristics of medical laser systems of “Perfocor” series, based on high-power waveguide CO2 lasers with pulse energy to 60 J, developed at ILIT RAS. The methods to determine the time of laser radiation penetration through the myocardium/blood boundary have been briefly discussed. The application of the “Perfocor” system in other laser operations on blood-filled organs has also been discussed.","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":"129852127","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}
{"title":"Precise optical dosimetry in low-level laser therapy of soft tissues in oral cavity","authors":"E. Stoykova, O. Sabotinov","doi":"10.1117/12.563280","DOIUrl":"https://doi.org/10.1117/12.563280","url":null,"abstract":"The new low level laser therapy (LLLT) is widely applied for treatment of diseases of the oral mucosa and parodont. Depending on indication, different optical tips and light-guides are used to create beams with a required shape. However, to the best of our knowledge, the developed irradiation geometries are usually proposed assuming validity of Bouger-Lambert law. This hardly corresponds to the real situation because of the dominating multiple scattering within 600-1200 nm range that destroys correlation between the emitted laser beam and the spatial distribution of the absorbed dose inside the tissue. The aim of this work is to base the dosimetry of the LLLT procedures of periodontal tissues on radiation transfer theory using a flexible Monte-Carlo code. We studied quantitatively the influence of tissue optical parameters (absorption and scattering coefficients, tissue refraction index, anisotropy factor) on decreasing of correlation between the emitted beam and the energy deposition for converging or diverging beams. We evaluated energy deposition for the developed by us LLLT system in a 3-D model of periodontal tissues created using a cross-sectional image of this region with internal structural information on the gingival and the tooth. The laser source is a CW diode laser emitting elliptical beam within 650-675 nm at output power 5-30 mW. To determine the geometry of the irradiating beam we used CCD camera Spiricon LBA 300.","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":"128219176","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}
{"title":"Results of the trials and light-delivery evaluation at low-level laser therapy of acute and chronic pain","authors":"Tatiana Roeva, T. Petrov, N. Minkovski","doi":"10.1117/12.563284","DOIUrl":"https://doi.org/10.1117/12.563284","url":null,"abstract":"Although the low-level laser therapy (LLLT) is accepted in the clinical practice, its efficiency is still questionable because of the unclear mechanisms of LLLT action. This work presents the results of LLLT applied to volunteers who need recovery from trauma or suffer from rheumatic diseases, inflammatory disorders, etc. The control group we used for comparison consisted of patients being treated by conventional therapy that included massage and acupuncture needles. The effectiveness of the LLLT was graded under four categories. Short-term and long-term side effects as well as conditions responding only to LLLT were recorded. The successful treatments were up to 70%, which coincided with the result of the control group. The LLLT was performed with a GaAs laser system SIX LASER IR - Bulgaria provided with additional set of six light CW emitting diodes to scan a larger area of a tissue surface. To evaluate the light delivery inside the tissue, the spatial maps of the light spot at the laser output in different operating regimes were measured. On their basis, the absorbed dose was calculated both in the boundary layer under the tissue surface and in depth using a reduced variance Monte-Carlo code.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"109 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":"122348305","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}