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Advanced High-Power Lasers and Applications最新文献

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FEL research at FEL Research Institute in Osaka 大阪FEL研究所的FEL研究
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380897
K. Imasaki, A. Nagai, A. Ishizu, K. Awazu, A. Moon, N. Nakao, Y. Tunawaki, N. Ohigasi, S. Kuruma, S. Nakai, K. Mima, C. Yamanaka
{"title":"FEL research at FEL Research Institute in Osaka","authors":"K. Imasaki, A. Nagai, A. Ishizu, K. Awazu, A. Moon, N. Nakao, Y. Tunawaki, N. Ohigasi, S. Kuruma, S. Nakai, K. Mima, C. Yamanaka","doi":"10.1117/12.380897","DOIUrl":"https://doi.org/10.1117/12.380897","url":null,"abstract":"Free Electron Laser Research Institute (FELI) had been established by the Key Technology Center project in Japan. Now it is operated under the collaboration of several organization after the end of the project. The FEL with wide tunable wave range from 0.27 to more than 50 micrometer installed in FELI has being used for applications of various fields. Beside the application of FEL as a users facility at FELI, an effort to extend the wavelength toward shorter region has being performed. SASE FEL with micro-wiggler and seed X-ray is proposed and preliminary investigation is under way. The basic development of micro-wiggler is almost finished. For seed X- ray, we will use Laser-produced Plasma X-ray. The 3D computer simulation results shows the feasibility of SASE in the range of up to 0.01 micrometer with FELI accelerator. This article describe the status and investigation of FELI update.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"63 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":"127275809","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
Burst-mode Q-switching operation of a Nd:YAG rod laser Nd:YAG棒激光器的突发模式调q操作
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380888
Y. Koyata, Shuhei Yamamoto, Y. Hirano
{"title":"Burst-mode Q-switching operation of a Nd:YAG rod laser","authors":"Y. Koyata, Shuhei Yamamoto, Y. Hirano","doi":"10.1117/12.380888","DOIUrl":"https://doi.org/10.1117/12.380888","url":null,"abstract":"High average power (grater than 100 W) with high brightness operation of diode-pumped rod type Nd:YAG laser is investigated. The key technologies to compensate thermal distortions are described and the high brightness operations of normal and Q-switched modes are demonstrated.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"86 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":"130581035","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: 10
High-power laser diode array phase locking 大功率激光二极管阵列锁相
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380868
V. Apollonov, S. I. Derzhavin, V. Filonenko, V. Kuzminov, D. A. Mashkovsky, A. Prokhorov
{"title":"High-power laser diode array phase locking","authors":"V. Apollonov, S. I. Derzhavin, V. Filonenko, V. Kuzminov, D. A. Mashkovsky, A. Prokhorov","doi":"10.1117/12.380868","DOIUrl":"https://doi.org/10.1117/12.380868","url":null,"abstract":"The overview of the phase-locking problem for the powerful laser diode arrays is presented. Comparison of the external Talbot cavity configuration with the other ones is held. Attention is paid to both investigation and employment of the laser diode arrays consisting of wide aperture lasers. Such arrays, placed in the external cavity, allow easier solution of the scaling up problem that results in the output lobes with both significantly increased power and low divergence. Our experiments confirm feasibility of both QCW and CW phase- locking of the LDA in the external quarter-Talbot (Lc equals ZT/4) cavity at the output power of more than 10 W with the lobes divergence of (delta) (Psi) approximately equals 0.5 mrad. Employment of the efficient porous heatexchanger along with the system that cancels both induced phase distortions arising due to heat release and existing optical imperfections has allowed a breakthrough in powerful arrays phase-locking.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"7 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":"115046255","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: 9
Conveniently assembled multiple-electrode-pair CO2 laser 方便组装多电极对CO2激光器
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380953
Lihua Ye, Xiangyen Li, A. He
{"title":"Conveniently assembled multiple-electrode-pair CO2 laser","authors":"Lihua Ye, Xiangyen Li, A. He","doi":"10.1117/12.380953","DOIUrl":"https://doi.org/10.1117/12.380953","url":null,"abstract":"A conveniently assembled multiple-electrode-pair (MEP) transversely excited amplify (TEA) CO2 laser is introduced in this paper. The laser is described from the view of device configuration, power supply, control circuit, and etc. The laser output is variable from single pulse to double pulse and multiple pulse with different assembly. We adopt a new alignment method for cavity. The pulse time interval given by control system is continuously adjustable from 0 to 150 microseconds. Experiments prove that the pulse series property is stable and that the pulse parameters are perfect. The conveniently assembled laser lay a foundation for the industry application of multiple-electrode-pair CO2 laser.","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":"134405610","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
High-power phase-conjugating mirror based on stimulated Brillouin scattering in solids 基于固体中受激布里渊散射的高功率相位共轭镜
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380864
H. Yoshida, H. Fujita, M. Nakatsuka, K. Yoshida
{"title":"High-power phase-conjugating mirror based on stimulated Brillouin scattering in solids","authors":"H. Yoshida, H. Fujita, M. Nakatsuka, K. Yoshida","doi":"10.1117/12.380864","DOIUrl":"https://doi.org/10.1117/12.380864","url":null,"abstract":"The possibility has been investigated that the optical glasses could be used as a solid-state phase conjugator for high power lasers. The solid SBS (stimulated Brillouin scattering) materials as effective phase conjugator can be performed with stable operation for improving the beam quality of high- average-power lasers. The advantage using solid material as phase-conjugating media is its reliability, environmental harmlessness and easy handling. An optical fiber offers a low power SBS threshold and stable performance at input energies of a few mJ level. Using a bulk optical glass, flint glass of SF-6 showed a much lower SBS threshold at 1.06 micrometer wavelength than fused silica glass because of its high SBS gain coefficient (9 cm/GW). However, the operating energy range of flint glass is limited by its low damage threshold. For long pulse duration using a longer focusing lens, fused- silica glass had high SBS reflectivity over 90% without any damage occurrence at the incident energy of 600 mJ in 18 ns at a repetition rate of 10 Hz. It shows also high SBS reflectivity of approximately over 95% at a single shot operation with no damage observation at a pumping energy of 2.3 J in 18 ns. These properties of the fused-silica are almost comparable with those of highly performed gases or liquids. Damage-free operation using a fused-silica as a better phase conjugation material would lead to construct more compact laser-diode pumped all-solid-state laser system.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"17 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":"134525383","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
Modulated molecular beam growth of mixed As/Sb layers for mid-infrared lasers 中红外激光器中As/Sb混合层的调制分子束生长
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380932
C. Mourad, K. Malloy
{"title":"Modulated molecular beam growth of mixed As/Sb layers for mid-infrared lasers","authors":"C. Mourad, K. Malloy","doi":"10.1117/12.380932","DOIUrl":"https://doi.org/10.1117/12.380932","url":null,"abstract":"Short period superlattices of the ternary InGaAs/InGaSb alloys are grown by molecular beam epitaxy with the intent of approximating a quaternary InGaAsSb alloy. This technique where a quaternary semiconductor alloy is replaced by building short period superlattices using its ternary constituents is referred to as 'digital alloying.' Three sets of 2 micrometer In0.1Ga0.9AsySb1-y bulk alloys are grown; the first set was grown conventionally with varying growth temperature, while the other two sets were grown digitally. The first set of digital alloys lattice matched to GaSb is grown at various substrate temperatures, the second set was grown at one constant growth temperature but with various superlattice periodicities. Using high-resolution x-ray diffraction and room temperature photoluminescence, the structural and optical properties of the bulk In0.1Ga0.9AsySb1-y alloys were investigated. It is observed that the digital alloys are less sensitive to changes in the growth temperature by a factor of approximately 3, and the maximum periodicity a digital alloy can be grown before the onset of relaxation is approximately 9 ML. An optically pumped approximately 2 micrometer laser structure with InGaAsSb quantum wells and AlGaAsSb barriers both grown using the digital alloy technique was characterized. Room temperature operation, a low threshold current density of 104 W/cm2 (at 80 K with 808 nm pump), and a high characteristic temperature (TO) of 104 K show the feasibility of applying digital alloying techniques to mid-infrared optical devices.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"1 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":"130846902","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
Thermal analysis of high-power LD-pumped slab Nd:YAG laser 大功率ld抽运板Nd:YAG激光器的热分析
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380879
Masao Sato, S. Naito, N. Iehisa, N. Karube
{"title":"Thermal analysis of high-power LD-pumped slab Nd:YAG laser","authors":"Masao Sato, S. Naito, N. Iehisa, N. Karube","doi":"10.1117/12.380879","DOIUrl":"https://doi.org/10.1117/12.380879","url":null,"abstract":"We have developed a high power LD pumped Nd:YAG laser using one zig-zag slab crystal, and obtained the average output power of 3.3 kW with the optical efficiency of more than 35% under the cooling condition of 12 degrees Celsius. Our method is to mount the LD stacks on both the sides of the 6 mm X 25 mm X 206 mm slab crystal in which the LD stacks mounted on one side of the slab pump the upper part of it while the ones on the other side pump the lower part. The LD pump light transmitted through the crystal is reflected by Au mirror and is introduced back into the slab. These LD stacks are arranged so that the thermally induced birefringence can be eliminated by maintaining uniform pumping in the width direction of the slab (non-zig-zag direction). The pumping distribution in the width direction was made constant by ray tracing simulation. The small signal gain distribution was measured constant in this direction, which indicates that the pumping distribution in the width direction has become uniform. The total heat generated in the slab was calculated to be less than 2.3 kW and the temperature distribution and thermal stress distribution were also simulated. According to this calculation, the maximum thermal stress of 40 MPa occurs in the surface of the slab, which is one-fourth of the fracture limit of YAG crystal.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"1 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":"131767853","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: 9
Industrial chemical oxygen-iodine laser at Tokai University 东海大学工业化学氧碘激光器
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380914
M. Endo, D. Sugimoto, S. Takeda, K. Nanri, T. Fujioka
{"title":"Industrial chemical oxygen-iodine laser at Tokai University","authors":"M. Endo, D. Sugimoto, S. Takeda, K. Nanri, T. Fujioka","doi":"10.1117/12.380914","DOIUrl":"https://doi.org/10.1117/12.380914","url":null,"abstract":"Development of Chemical Oxygen-Iodine Laser (COIL) in Tokai University is described. From FY1996, we have conducted a three-year research project sponsored by NEDO (New Energy and industrial technology Development Organization), and it was finished in March 1999. As a result, high-efficiency operation (23.4%) of COIL with nitrogen as a buffer gas was demonstrated. Reduction of the vacuum pump size by the high- pressure subsonic mode operation with turbo blower was demonstrated. Specific energy reached to 3.5 J/liter. Output power stabilization/modulation technique by the external magnetic field was developed. Twisted Aerosol Singlet Oxygen Generator (TA-SOG) was tested and its performance was compared to liquid-jet SOG. TA-SOG was operated at the internal gas velocity of 85 m/s. Novel unstable resonator was developed with the aid of newly developed FFT code. We are now conducting a one-year project whose goal is a development of a 1 kW-class system capable of one-hour stable operation. Finally, three operation modes of future industrial COIL are proposed.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"19 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":"125229567","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: 7
Modeling of a pulsed HF chemical laser pumped by a VUV radiation source 由VUV辐射源泵浦的脉冲HF化学激光器的建模
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380855
Marc P. Sabonnadiere, V. Tcheremiskine, P. Delaporte, L. Mikheev, M. Sentis
{"title":"Modeling of a pulsed HF chemical laser pumped by a VUV radiation source","authors":"Marc P. Sabonnadiere, V. Tcheremiskine, P. Delaporte, L. Mikheev, M. Sentis","doi":"10.1117/12.380855","DOIUrl":"https://doi.org/10.1117/12.380855","url":null,"abstract":"We introduce a numerical investigation of a HF photochemical laser pumped by planar multi-channel sliding discharge to study the possibility of advanced laser characteristic achievement using such pumping source. The model considers transport of VUV pump radiation through the nonlinear absorptive active medium containing NF3/H2/N2Ar gas mixture coupled with chemical and lasing kinetics describing the temporal and spatial evolution of particle species and intracavity lasing photons. The relative importance of various kinetic processes is evaluated and the 3.2 J/liter laser specific energy is calculated.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"30 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":"125048193","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
Laser-diode-pumped eight-pass 100-W-class Nd:YAG zig-zag slab laser amplifier 激光二极管泵浦八通100 w级Nd:YAG锯齿形平板激光放大器
Advanced High-Power Lasers and Applications Pub Date : 2000-04-03 DOI: 10.1117/12.380937
Y. Kato, M. Terada, H. Kiriyama, M. Yamanaka, Y. Izawa, S. Nakai, T. Kanzaki, H. Miyajima, M. Miyamoto, H. Kan
{"title":"Laser-diode-pumped eight-pass 100-W-class Nd:YAG zig-zag slab laser amplifier","authors":"Y. Kato, M. Terada, H. Kiriyama, M. Yamanaka, Y. Izawa, S. Nakai, T. Kanzaki, H. Miyajima, M. Miyamoto, H. Kan","doi":"10.1117/12.380937","DOIUrl":"https://doi.org/10.1117/12.380937","url":null,"abstract":"A novel laser architecture of laser-diode pumped eight pass 1064-nm Nd:YAG zig-zag slab laser amplifier with thermal birefringence compensation by use of a 90 degree quartz rotator has been developed aiming to achieve a high average power laser with high efficiency and good beam quality. With a 100 W (1 kHz) class module, the basic performance of the novel concept was examined by demonstrating an average power of 68 W with a high energy extraction efficiency of 61% for the laser mode volume at an initial small signal gain of 3.03 on single pass, and an excellent beam quality, undernegligible thermal lensing with the compensation for thermal birefringence.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"87 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":"126192545","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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