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Development of high-spectral-purity tunable lasers using an auxiliary selected generation 采用辅助选择发生器的高光谱纯度可调谐激光器的研制
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563096
P. Uzunova, M. Deneva, N. Vasilev
{"title":"Development of high-spectral-purity tunable lasers using an auxiliary selected generation","authors":"P. Uzunova, M. Deneva, N. Vasilev","doi":"10.1117/12.563096","DOIUrl":"https://doi.org/10.1117/12.563096","url":null,"abstract":"We have developed and investigated a simple solution of tunable laser with strongly decreased background emission (max pick-to-pick power ratio ≤ 10-8) by generation at additional wavelengths, except the selected. The cavity scheme permits to obtain easily laser output only at the selected wavelength, using a simple system with interference wedges. The spectral position and the losses at both generations are easily and independently controlled to needed optimal values. The theoretical treatment based on the rate equation system, shows that for the appropriate chosen conditions the technique developed permits to reduce by approximately two orders of magnitude the intensity of the background emission about the selected line (pick power to be less than 10-8). The investigation is on the example of pulsed dye lasers. The results are applicable for other tunable lasers with homogeneously broadened active medium such as Ti:sapphire, diode, etc. The lasers of considered type (with high spectral purity) are of essential interest for application in biomedical investigations of tissue luminescence spectrum, in Raman spectroscopic investigation, in isotope separation.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"96 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":"115666305","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
Spectroscopic investigation of laser-induced processes in a series of azobenzene-containing side-chain polymers 一系列含偶氮苯侧链聚合物激光诱导过程的光谱研究
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563089
G. Martínez-Ponce, T. Petrova, N. Tomova, V. Dragostinova, T. Todorov, L. Nikolova
{"title":"Spectroscopic investigation of laser-induced processes in a series of azobenzene-containing side-chain polymers","authors":"G. Martínez-Ponce, T. Petrova, N. Tomova, V. Dragostinova, T. Todorov, L. Nikolova","doi":"10.1117/12.563089","DOIUrl":"https://doi.org/10.1117/12.563089","url":null,"abstract":"We investigate the photoinduced processes in films of a series of three side-chain azobenzene-containing polymers, which differ only in the length of the spacers attaching the chromophores to the main chain. Two of them are amorphous and one is liquid-crystalline. Illumination of the polymer films with an Ar-laser beam results in changes in their absorption spectra and to the appearance of dichroism. In the polymer with shortest spacers the irradiation gives rise to a considerable photoequilibrium concentration of cis-azobenzenes resulting from the photoinduced reversible trans-cis isomerization. In the polymer with long spacers, which is liquid-crystalline, the main result from the irradiation is the reorientation of the trans-azobenzenes and the photodichroism in this film is much larger. The induced dichroism is stable in this liquid-crystalline film; it disappears with time in the amorphous films.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"8 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":"124939683","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
6.5-kW high-power diode-pumped laser module 6.5 kw大功率二极管泵浦激光模块
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563103
C. Zhen, L. Qiang, W. Yong, P. Yu, Gao Xin, Tang Chun, Tang Yan
{"title":"6.5-kW high-power diode-pumped laser module","authors":"C. Zhen, L. Qiang, W. Yong, P. Yu, Gao Xin, Tang Chun, Tang Yan","doi":"10.1117/12.563103","DOIUrl":"https://doi.org/10.1117/12.563103","url":null,"abstract":"This paper investigates, theoretically and experimentally, the elements which influence the gain distribute of laser medium. A high power storage laser module has been manufactured. In this module a 6 mm diameter Nd:YAG rod which is 100 mm long is pumped by nine diode-arrays (the peak pump-power is 6500 W). Each array consisted of nine diodes. On account of the uniformity of distribute in whole laser medium, a Nd-doping of 0.6% laser rod is chosen, and in order to eliminate self-oscillation, two ends are made to inclined planes. Numerical calculation has been done to optimize the distance between the diode and Nd:YAG. The experiment result approved that the gain coefficient of this module is 0.3 cm-1, from it we can infer that the storage power is about 400 mJ per pulse.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"17 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":"117094686","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
Development of deep-ultraviolet metal vapor lasers 深紫外金属蒸汽激光器的研制
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563100
N. Sabotinov
{"title":"Development of deep-ultraviolet metal vapor lasers","authors":"N. Sabotinov","doi":"10.1117/12.563100","DOIUrl":"https://doi.org/10.1117/12.563100","url":null,"abstract":"Deep ultraviolet laser generation is of great interest in connection with both the development of new industrial technologies and applications in medicine, biology, chemistry, etc. The development of metal vapor UV lasers oscillating in the pulsed mode with high pulse repetition frequencies and producing high average output powers is of particular interest for microprocessing of polymers, photolithography and fluorescence applications. At present, metal vapor lasers generate deep-UV radiation on the base of two methods. The first method is non-linear conversion of powerful laser generation from the visible region into the deep ultraviolet region. The second method is direct UV laser action on ion and atomic transitions of different metals.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"50 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":"116211025","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 investigation of turbulence in FAF CO2 laser by phase-conjugation method 用相位共轭法研究FAF CO2激光器的湍流
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563110
Sergey A. Buyarov, M. G. Galushkin, V. D. Dubrov, V. Panchenko, Y. N. Zavalov
{"title":"The investigation of turbulence in FAF CO2 laser by phase-conjugation method","authors":"Sergey A. Buyarov, M. G. Galushkin, V. D. Dubrov, V. Panchenko, Y. N. Zavalov","doi":"10.1117/12.563110","DOIUrl":"https://doi.org/10.1117/12.563110","url":null,"abstract":"The spectra of pulsation of signal beam of intracavity four-wave mixing in 1 kW fast-axial-flow CO2 laser were measured. The information about turbulent parameters of laser-active medium flow was obtained.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"148 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":"127152314","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
Transition probabilities of some Ag II and Cu II lines 一些Ag II和Cu II谱线的跃迁概率
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563206
M. Ortiz, R. Mayo, K. Blagoev, G. Malcheva
{"title":"Transition probabilities of some Ag II and Cu II lines","authors":"M. Ortiz, R. Mayo, K. Blagoev, G. Malcheva","doi":"10.1117/12.563206","DOIUrl":"https://doi.org/10.1117/12.563206","url":null,"abstract":"Experimental transition probabilities arising from 4d8 5s2, 4d9 6s and 4d9 5d levels of Ag II and 3d8 4s2 level of Cu II were measured. A time-resolved system with a Nd-YAG laser that produced free neutral and ionized silver and copper plasma by ablation was used. Transition probabilities were deduced by measured branching ratio and experimental and theoretical data for radiative lifetimes. A comparison between our values and the theoretical ones is made where available.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"97 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":"131263853","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
Enhancement of hydroxyapatite formation by laser-liquid-solid interaction 激光-液-固相互作用增强羟基磷灰石形成
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563093
L. Pramatarova, E. Pecheva, T. Petrov, N. Minkovski, A. Kondyurin, Radina Pramatarova
{"title":"Enhancement of hydroxyapatite formation by laser-liquid-solid interaction","authors":"L. Pramatarova, E. Pecheva, T. Petrov, N. Minkovski, A. Kondyurin, Radina Pramatarova","doi":"10.1117/12.563093","DOIUrl":"https://doi.org/10.1117/12.563093","url":null,"abstract":"In this paper the use of stainless steel, silicon and silica glass substrates for the growth of hydroxyapatite (HA, widely used as artificial bone material), induced by a laser-liquid-solid-interaction is reported. The method allows growing of HA layer by using the interaction between a laser beam and a liquid precursor solution, as well as laser irradiation of the substrate during the laser-liquid interaction. The scanned laser beam (pulsed CuBr laser) is directed at the solid substrate, which is immersed in the solution, which resembles the ion composition and concentrations of the human blood plasma (simulated body fluid, SBF). The set-up includes an open deposition system, which allows the introduction of the laser beam led by a scanning system. It is shown that the proposed method enhances the HA formation, in comparison with the traditional methods of prolonged soaking in SBF. The HA layers grown in this manner are investigated by Light Microscopy (LM), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX) Spectroscopy, X-ray Diffraction (XRD), Fourier Transform Infrared (FTIR) and Raman Spectroscopy.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"177 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":"134224561","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
Infrared hollow optical fibers and their applications in medicine 红外中空光纤及其在医学中的应用
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563189
Yi-Wei Shi, Y. Matsuura, K. Iwai, M. Endo, T. Katagiri, M. Miyagi
{"title":"Infrared hollow optical fibers and their applications in medicine","authors":"Yi-Wei Shi, Y. Matsuura, K. Iwai, M. Endo, T. Katagiri, M. Miyagi","doi":"10.1117/12.563189","DOIUrl":"https://doi.org/10.1117/12.563189","url":null,"abstract":"Techniques for coating hollow glass fibers with layers of silver and cyclic olefin polymer have been developed for low-loss delivery of infrared laser light as well as a visible pilot beam. They have yielded losses of only 0.2 dB/m for Er:YAG and CO2 laser light and only 0.7 dB/m for red LD laser light. Debris is kept from entering the hollow output end of a fiber by hermitically sealing it with a quartz cap, and various focusing effects in both air and water have been obtained by controlling distal-end geometry of the caps during fabrication. Controlled focus patterns of Er:YAG laser light with an output energy of more than 400 mJ and a 10-Hz repetition rate have been delivered in saline through the fibers with sealing caps. Calculi were fragmented in vitro by using a hollow fiber with a sealing cap. It has been shown that Er:YAG laser combined with an effective delivery system could be used for minimally invasive calculi fragmentation.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"5 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":"124297931","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
Intracavity laser spectrum analyzers for diagnostics of fullerenic molecular clusters 用于富勒烯分子簇诊断的腔内激光光谱分析仪
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563085
A. N. Kolerov, S. I. Krasnov
{"title":"Intracavity laser spectrum analyzers for diagnostics of fullerenic molecular clusters","authors":"A. N. Kolerov, S. I. Krasnov","doi":"10.1117/12.563085","DOIUrl":"https://doi.org/10.1117/12.563085","url":null,"abstract":"The opportunity of using intracavity laser spectroscopy for studying the process of formation of fullerenic molecular clusters on carbon and metal-carbon to a basis, synthesized in light erosion to heterogeneous plasma was investigated. As an indicator of formation of fullerenic weights in plasma the effect of condensation of a spectrum radiation tunable the laser served.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"9 4 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":"115932758","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
Frequency stability comparison of diode lasers locked to Doppler and sub-Doppler resonances 锁定在多普勒和亚多普勒共振的二极管激光器的频率稳定性比较
International Conference on Laser and Laser Information Technologies Pub Date : 2004-06-21 DOI: 10.1117/12.563212
C. Affolderbach, C. Andreeva, S. Cartaleva, G. Mileti, D. Slavov
{"title":"Frequency stability comparison of diode lasers locked to Doppler and sub-Doppler resonances","authors":"C. Affolderbach, C. Andreeva, S. Cartaleva, G. Mileti, D. Slavov","doi":"10.1117/12.563212","DOIUrl":"https://doi.org/10.1117/12.563212","url":null,"abstract":"We present a systematic quantitative comparison of the performance parameters of two Extended Cavity Diode Lasers (ECDL), stabilized to Doppler and sub-Doppler profiles. The experimental study is carried out on Rb atomic vapour cells. The frequency shift of the resonance under investigation with respect to a reference resonance is measured and analyzed, in dependence on the modulation amplitude, cell temperature, laser power, applied magnetic field and misalignment of the pump-probe beams angle. The Allan variance is measured for both locking methods. It shows that the stabilization to the Doppler profile results in about one order of magnitude lower stability than the one to SA resonances for the short-term measurement. However, the stability achieved using both methods is sufficient for many applications and for some of them the simplicity of the Doppler locking method can be advantageous.","PeriodicalId":194489,"journal":{"name":"International Conference on Laser and Laser Information Technologies","volume":"47 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":"128702752","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
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