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Advanced High-Power Lasers and Applications最新文献

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Gas dynamic lasers of a short and medium IR range on halogen molecules: analysis and perspectives 卤素分子的中短红外气体动态激光器:分析与展望
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380857
A. Starik
{"title":"Gas dynamic lasers of a short and medium IR range on halogen molecules: analysis and perspectives","authors":"A. Starik","doi":"10.1117/12.380857","DOIUrl":"https://doi.org/10.1117/12.380857","url":null,"abstract":"Theoretical and numerical analysis of energetic characteristics of gasdynamic lasers on active media containing diatomic metastable molecules H2, D2, N2 and halogen molecules was carried out. It was estimated that the most promising from the point of view of receiving the highest specific radiation energy and conversion efficiency of vibrational energy are mixtures D2-DCl, D2-HBr, N2-DCl, N2-DJ, N2-DBr, D2-HJ and H2-HCl. At thermal excitation they allow to achieve efficiency from 1% to 4% and at electrodischarge excitation from 10% to 25%, the specific radiation energy reaching 60 - 300 Joule/g.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"19 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121007475","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
Toward 1-TW train of 10-μm picosecond laser pulses 1-TW的10 μm皮秒激光脉冲序列
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380904
V. Apollonov, K. Kazakov, N. V. Pletnyev, V. Sorochenko
{"title":"Toward 1-TW train of 10-μm picosecond laser pulses","authors":"V. Apollonov, K. Kazakov, N. V. Pletnyev, V. Sorochenko","doi":"10.1117/12.380904","DOIUrl":"https://doi.org/10.1117/12.380904","url":null,"abstract":"The results of principal upgrade of high-pressure, X-ray preionized TE-CO2 laser towards obtaining 10 atm volume self-sustained discharge in CO2:N2:He mixtures with reasonably high (up to 25%) percentage of molecular gases are reported. The estimated energy of radiation from such a laser is greater than or equal to 15 J. It corresponds to peak power of regeneratively amplified 2 ps 10 micrometer pulse formed in master oscillator of laser system greater than or equal to 1.5 TW.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126907546","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
Flash-lamp pumped high-power Cr-Tm:YAG and Cr-Tm-Ho:YAG lasers operating at 2-um wavelength 闪光灯泵浦高功率Cr-Tm:YAG和Cr-Tm- ho:YAG激光器工作在2um波长
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380894
Cheng Li, D. Shen, Jien Song, N. S. Kim, K. Ueda
{"title":"Flash-lamp pumped high-power Cr-Tm:YAG and Cr-Tm-Ho:YAG lasers operating at 2-um wavelength","authors":"Cheng Li, D. Shen, Jien Song, N. S. Kim, K. Ueda","doi":"10.1117/12.380894","DOIUrl":"https://doi.org/10.1117/12.380894","url":null,"abstract":"Tm and Ho doped solid-state lasers operate at 2-micron wavelength have many applications in medical, remote sensing, and military technologies. Using flash-lamp pumping, we demonstrated high-power Cr-Tm:YAG and Cr-Tm-Ho:YAG lasers at room temperature. The output energy in free-running operation exceeded more than 4 J. When an acousto-optic Q-switch was used, we obtained Q-switched single transverse-mode lasers at 2 micrometer wavelength. The maximum pulse energy of Cr-Tm:YAG and Cr-Tm-Ho:YAG lasers reached 0.7 J and 0.5 J, respectively, and the corresponding pulse widths were 140 ns and 165 ns.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128119789","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
Highly efficient heat exchangers for laser diode arrays 用于激光二极管阵列的高效热交换器
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380919
V. Apollonov, S. I. Derzhavin, V. Filonenko, V. Kuzminov, D. A. Mashkovsky, A. Prokhorov, V. Timoshkin
{"title":"Highly efficient heat exchangers for laser diode arrays","authors":"V. Apollonov, S. I. Derzhavin, V. Filonenko, V. Kuzminov, D. A. Mashkovsky, A. Prokhorov, V. Timoshkin","doi":"10.1117/12.380919","DOIUrl":"https://doi.org/10.1117/12.380919","url":null,"abstract":"Highly efficient heat exchangers with uniform temperature distribution based on microchannel and porous structure are developed. The heat exchange efficiency dependence on construction peculiarities of the devices and cooling liquids properties are shown. Basing on the comparison of both experimental results and the numerical simulation, the ways to obtain the device thermal resistance about 0,2 C/W are discussed. Practical neededs for fabrication both linear diode arrays with power more than 1 kW will be observed.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133709757","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
Development of subpicosecond Yb:YAG laser for material processing 用于材料加工的亚皮秒Yb:YAG激光器的研制
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380942
Eisaku Sano, M. Fujita, T. Kawashima, M. Yamanaka, Y. Izawa, S. Nakai, C. Yamanaka
{"title":"Development of subpicosecond Yb:YAG laser for material processing","authors":"Eisaku Sano, M. Fujita, T. Kawashima, M. Yamanaka, Y. Izawa, S. Nakai, C. Yamanaka","doi":"10.1117/12.380942","DOIUrl":"https://doi.org/10.1117/12.380942","url":null,"abstract":"The use of sub-ps laser pulses for material processing results in very precise cutting and drilling with high efficiency. But the energy of femtosecond laser pulse is essentially small. To accomplish high throughput for the industrial applications, it is required to operate the laser system at a high repetition rate and thus at a high average power. Therefore, we decided to develop a LD-pumped femtosecond MHz Yb:YAG MOPA laser system. As a first step, the development of a Yb:YAG oscillator, which employs Kerr-lens mode locking, is in progress.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"337 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133866510","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
LD-pumped slab Yb:YAG laser ld抽运板Yb:YAG激光器
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380886
Masao Sato, N. Iehisa, N. Karube
{"title":"LD-pumped slab Yb:YAG laser","authors":"Masao Sato, N. Iehisa, N. Karube","doi":"10.1117/12.380886","DOIUrl":"https://doi.org/10.1117/12.380886","url":null,"abstract":"In recent years, the high power Yb:YAG lasers have been actively investigated due to the advantage of the high quantum efficiency of 91% which reduces the thermal loading in the Yb:YAG crystal. So far, the Yb:YAG laser with the output power higher than several hundreds watts has been developed using the crystal configurations of rod and thin disk. We have developed the Yb:YAG laser by employing the rectangular slab crystal in order to examine the possibility of realizing the high power slab Yb:YAG laser. The dimension of the Yb:YAG crystal used is 1 mm X 5 mm X 10 mm and its configuration is a rectangular parallelepiped, and the density of Yb is 1.1 atom%. The LD (Laser Diode) pump light focused with plano-convex lens is introduced through the 1 mm X 10 mm plane of this slab which is AR-coated at 940 nm while the opposite 1 mm X 10 mm plane is HR-coated at the same wavelength. The Yb:YAG laser cavity axis is in the direction perpendicular to the 1 mm X 5 mm planes which are AR-coated at 1030 nm. The two 5 mm X 10 mm planes are cooled by being contacted with the copper heat sinks which are cooled by the water at the temperature of 18 degrees Celsius. The CW output of 35 W was obtained when the power of LD pump light was 496 W. The optical efficiency was 7.1% with the optical slop efficiency of 12.2%.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115955941","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
Pulse shaping of KrF laser by stimulated Brillouin scattering KrF激光的受激布里渊散射脉冲整形
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380859
K. Kuwahara, E. Takahashi, Y. Matsumoto, S. Kato, Y. Owadano
{"title":"Pulse shaping of KrF laser by stimulated Brillouin scattering","authors":"K. Kuwahara, E. Takahashi, Y. Matsumoto, S. Kato, Y. Owadano","doi":"10.1117/12.380859","DOIUrl":"https://doi.org/10.1117/12.380859","url":null,"abstract":"A new technique for pulse shortening by a combination of pulse shaping and saturated amplification was developed. Two-step stimulated Brillouin scattering was used for the pulse shaping. The generated Stokes pulse was amplified by a discharge KrF laser amplifier under strongly saturated condition. The amplified Stokes pulse with 44 ps rise-time and 54 ps pulse width (FWHM) was obtained.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117093956","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: 3
High-peak-power pulse laser for laser-induced breakdown 用于激光诱导击穿的峰值功率脉冲激光器
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380903
T. Ueda, M. Wakamatsu, Nobuhiro Tomosada, Hisanori Hayashi, T. Sugiyama, T. Yagi, Goichi Ohmae
{"title":"High-peak-power pulse laser for laser-induced breakdown","authors":"T. Ueda, M. Wakamatsu, Nobuhiro Tomosada, Hisanori Hayashi, T. Sugiyama, T. Yagi, Goichi Ohmae","doi":"10.1117/12.380903","DOIUrl":"https://doi.org/10.1117/12.380903","url":null,"abstract":"Using light (photons) as a means to measure various kinds of physical quantities in their normal environment has the advantage of real-time and precise measurement without interference from other objects. In the semiconductor process, for example, the measurement limit of particle size is down to 0.1 micrometer and the measurement of elements that the particles are composed of is impossible. Presently, there is only one measuring instrument that can measure the elements and diameter of particles at the same time by putting particles in microwave induced He plasma. However, the minimum size with which particles of hydrocarbon material can be measured is limited to several micrometer by this method. This method can not be applied to the measurement of sub-micron particles, which is important to the semiconductor process and for functional particles. The Final goal of the research is to develop devices and systematization technology needed for the newly proposed particle measurement technology using laser induced breakdown (LIB). In particle Measurement using LIB, indispensable high peak, power pulse laser (HPPL) for breakdown generation, ultraviolet fiber for passing fluorescence light and a high speed photo detection device having sub-micro second time resolution are needed. Furthermore, it is necessary to develop systematization technology and obtain final system evaluation when using these device technologies. In this paper, we mainly report on the experimental results of High Peak Power Laser (HPPL) for LIB and its basic consideration in the fiscal year 1999.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"48 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114136252","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
Highly efficient second harmonic generation by using four pass quadrature frequency conversion 采用四通正交变频产生高效二次谐波
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380943
H. Kiriyama, Shinichi Matsuoka, Y. Maruyama, T. Matoba, T. Arisawa
{"title":"Highly efficient second harmonic generation by using four pass quadrature frequency conversion","authors":"H. Kiriyama, Shinichi Matsuoka, Y. Maruyama, T. Matoba, T. Arisawa","doi":"10.1117/12.380943","DOIUrl":"https://doi.org/10.1117/12.380943","url":null,"abstract":"A novel frequency converter architecture of four-pass quadrature frequency conversion scheme was developed aiming to achieve high conversion efficiency. A high conversion efficiency of more than 80% has been achieved in this scheme for frequency doubling of 1064-nm in KTP with a low input fundamental laser intensity of 76 MW/cm2. A second- harmonic output of 486 mJ was obtained with 607 mJ of the input 1064-nm fundamental laser at 10 Hz.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"186 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114216691","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
Fabrication of large-aperture random phase plate for uniform illumination on laser fusion target 激光聚变靶均匀照明大孔径随机相位板的制备
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380867
Huijie Huang, Dunwu Lu, Runwen Wang, Yongkai Zhao, Zengshui Liu
{"title":"Fabrication of large-aperture random phase plate for uniform illumination on laser fusion target","authors":"Huijie Huang, Dunwu Lu, Runwen Wang, Yongkai Zhao, Zengshui Liu","doi":"10.1117/12.380867","DOIUrl":"https://doi.org/10.1117/12.380867","url":null,"abstract":"We have fabricated a large aperture random phase plate (RPP) in Chinese K9 glass substrate for target-plane laser beam smoothing at 1.06 micrometer wavelength, by using large aperture photolithography and dilute HF etching processes. The RPP's clear aperture is (phi) 250 mm. The measured average step height is 1.060 micrometer, which has a relative standard deviation of 1.24% at 5 locations on the RPP to the theoretical value. A focal spot with very sharp edges and nearly flat-top overall envelope intensity distribution is obtained at the focal-plane of a focusing lens. These results show that our fabrication techniques for RPP is effective, and is easily scaleable to even larger apertures.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125890708","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
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