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Littérature scientifique sur le sujet « Disk laser »

Auteur : Grafiati

Publié le 10 mars 2023

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Articles de revues sur le sujet "Disk laser"

1

Xiahui Han, Xiahui Han, et and Jianlang Li and Jianlang Li. « Maglev rotating disk laser ». Chinese Optics Letters 13, n^o 12 (2015) : 121403–6. http://dx.doi.org/10.3788/col201513.121403.

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Zubov, Fedor I., Eduard I. Moiseev, Mikhail V. Maximov, Alexandr A. Vorobyev, Alexey M. Mozharov, Yuri M. Shernyakov, Nikolay A. Kalyuzhnyy et al. « Half-disk lasers with active region based on InGaAs/GaAs quantum well-dots ». Laser Physics 32, n^o 12 (28 octobre 2022) : 125802. http://dx.doi.org/10.1088/1555-6611/ac996f.

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Abstract Half-disk lasers fabricated by cleaving initial full-disk lasers have an advantage of directional light outcoupling as well as increased output power and efficiency as compared to full-disk lasers of the same diameter. The continuous wave output power of a 200 µm diameter half-disk laser exceeds 70 mW. Quasi single-mode lasing with a high side-mode suppression ratio more than 20 dB is demonstrated for half-disk lasers of various diameters. A maximum 3 dB small signal modulation frequency of 4.9 GHz was measured for a 100 µm in diameter half-disk laser.

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Kaglyak, Oleksiy, Alina Klimova, Oleksandr Poleshko, Oleksii Goncharuk et Leonid Golovko. « Modernization of disc laser design using ellipsoid illuminator ». Mechanics and Advanced Technologies 6, n^o 1 (31 mai 2022) : 56–61. http://dx.doi.org/10.20535/2521-1943.2022.6.1.257026.

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Solid state disk lasers have a number of advantages over lasers with a rod active element. In particular, due to efficient heat dissipation, there is no thermal deformation of the active element and its transformation from the optical point of view into a lens. That in turn improves the stability of the generated laser beam and reduces the risk to lose of resonator stability. In addition, disk lasers are able to generate high power at a compact size. However, to ensure the direction of the pump radiation on the active element, disk lasers require a complex mirror system of reflection of the pump beams, and therefore have design limitations on the introduction of pump energy into the active element. This article is dedicated to the development of the design of pumping system, which will increase the intensity of pumping the active element of the disk laser, which will increase the generated power. The article presents the original design of a disk laser with an ellipsoidal illuminator and a tiered system for pumping the active element by diode laser radiation. The results of modeling the heat dissipation from the active element to the refrigerator are presented. The estimation of the efficiency of excitation of the active element when using an ellipsoidal illuminator and the procedure for calculating the parameters of the generated laser beam are given.

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4

Chilamakuri, S., X. Zhao et B. Bhushan. « Failure analysis of laser-textured surfaces ». Proceedings of the Institution of Mechanical Engineers, Part J : Journal of Engineering Tribology 214, n^o 5 (1 mai 2000) : 471–83. http://dx.doi.org/10.1243/1350650001543340.

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Friction/stiction behaviour of ultrahigh-density magnetic disk drives can be controlled by controlling the size and shape of the laser bumps. Tribological behaviour of laser-textured disk surfaces depends on the size and shape of the laser bumps, bump density and operating conditions. In this study, theoretical and experimental analyses have been carried out on nine different laser-textured disk surfaces. Stiction and friction experiments have been carried out on sombrero, V-type and W-type laser-textured disks and these results are compared with theoretical results. A good correlation is obtained between experimental and theoretical results. The effect of laser bump uniformity on critical number of bumps required to prevent plastic deformation and stiction has also been studied.

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5

Chen, Yongqian, Si Chen, Yuzhi Huang, Xianshi Jia, Hantian Chen et Xiwang Wu. « Fluorescence Radiation and Thermal Effect at the Edge of the Disk-Shaped Laser Crystal ». International Journal of Optics 2022 (20 octobre 2022) : 1–8. http://dx.doi.org/10.1155/2022/2977673.

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The fluorescence radiation property at the edge of the thin disk crystal is very important to the design of thin disk lasers. In order to study this effect, in this paper, we established a theoretical model to describe the edge fluorescence radiation process in thin disk lasers. Subsequently, we used a thin disk crystal with indium absorption cladding to quantitatively test the edge fluorescence intensity. The significant difference between measured and simulated data can be described as P (probability value) < 0.1 at the edge when the measured temperature is lower than the melting point of the metal cladding, and P < 0.05 at the pump area. Finally, we analyze the influence of the edge fluorescence radiation on the thin disk laser operation, and the results show that the edge thermal effect will reduce the conversion efficiency of the disk laser by 20%. To the best of our knowledge, this is the first quantitative study on the edge radiation intensity of disk lasers. The research can provide theoretical guidance for the designing and packaging process of crystal elements in thin disk lasers.

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Glavnyi, V. G., V. V. Rakhmanov, S. V. Dvoynishnikov, S. V. Krotov et V. G. Meledin. « Calibration platform controller of the laser Doppler anemometer ». Journal of Physics : Conference Series 2057, n^o 1 (1 octobre 2021) : 012092. http://dx.doi.org/10.1088/1742-6596/2057/1/012092.

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Abstract Primary standards for the unit of air flow velocity often use a Laser Doppler Anemometer (LDA) as the primary measurement standard. A rotating disc with a fixed diameter is used to calibrate LDA. The paper proposes calibration platform based on the precision mechanics of HDD disk. A disk rotation controller has been developed for the platform. Deviations of the disk rotation speed do not exceed 0.01% RMS in the range of angular speeds of 600-4800 rpm.

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7

Apollonov, Victor V. « High power disk laser ». Natural Science 05, n^o 05 (2013) : 556–62. http://dx.doi.org/10.4236/ns.2013.55070.

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Wentsch, Katrin Sarah, Birgit Weichelt, Stefan Günster, Frederic Druon, Patrick Georges, Marwan Abdou Ahmed et Thomas Graf. « Yb:CaF_2 thin-disk laser ». Optics Express 22, n^o 2 (15 janvier 2014) : 1524. http://dx.doi.org/10.1364/oe.22.001524.

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9

Lee, R. K., O. J. Painter, B. Kitzke, A. Scherer et A. Yariv. « Photonic bandgap disk laser ». Electronics Letters 35, n^o 7 (1999) : 569. http://dx.doi.org/10.1049/el:19990415.

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Ricaud, S., A. Jaffres, P. Loiseau, B. Viana, B. Weichelt, M. Abdou-Ahmed, A. Voss et al. « Yb:CaGdAlO_4 thin-disk laser ». Optics Letters 36, n^o 21 (19 octobre 2011) : 4134. http://dx.doi.org/10.1364/ol.36.004134.

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Thèses sur le sujet "Disk laser"

1

Hempler, Nils. « Semiconductor disk laser pumped Cr²⁺:chalcogenide lasers ». Thesis, University of Strathclyde, 2010. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=15339.

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Zhang, Tao. « High power disk laser cutting ». Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609511.

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Butkus, Mantas. « Quantum dot based semiconductor disk lasers ». Thesis, University of Dundee, 2012. https://discovery.dundee.ac.uk/en/studentTheses/6b17df24-a721-4904-b49f-e35055990c16.

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Since its first successful demonstration more than five decades ago [1], laser technology experienced a huge leap forward in terms of technological innovations and the understanding of underlying physical principles of operation. There were many efforts made by those in both the scientific and commercial communities who envisioned the potential of lasers. As a result, the laser now is a powerful scientific tool in many disciplines. It is widely used not only in physics, but also in chemistry, biology, medicine, engineering, environmental sciences, arts and their interdisciplinary fields. Moreover, it now has a vast number of applications in industry and everyday life whether it is light and matter interaction, communication and IT, healthcare and many other uses of this light source. By the same time, photonics comprises a market of multi-billion EUR value [2].At every stage of development, different laser parameters were engineered to suit those to specific application with some other parameters usually being sacrificed. Together with this, things like compactness and cost were always an issue to consider. A huge impact to the field of photonics was made by the development of semiconductor based structures that could be used as a light amplifying medium. Semiconductor lasers not only allowed the miniaturization of many devices, but also provided new opportunities for laser scientists due to ability to engineer their bandgap properties and to confine the carriers in different dimensions.The development of vertical external cavity surface emitting lasers (VECSELs), which are also known as optically pumped semiconductor lasers (OPSLs) or semiconductor disk lasers (SDLs) realized an important feature in semiconductor based lasers – high multi- Watt output power was combined with diffraction limited output beam profile.This work is devoted to the development of semiconductor disk lasers based on novel quantum dot (QD) structures. QD structures were embedded in this type of laser recently and allowed a number of advantages compared with the widely used quantum well (QW) structure. These included new spectral region coverage at 1-1.3 µm, enhanced wavelength tuneability and ultrafast carrier dynamics, which potentially will improve mode locked operation. QDs were also used as a base for semiconductor saturable absorbers in modelocking experiments.During the time of these studies, QD SDLs at new spectral regions and record output power were demonstrated. Power scaling up to 6 W was achieved for 1040 nm, 2.25 W for 1180 nm and 1.6 W for 1260 nm devices. Excited state transition in QDs was shown to be more efficient for high power QD SDLs as compared with ground state transition. New spectral regions were covered by QD SDLs using frequency doubling into the visible region with green, orange and red light emission with output powers of 2 W, 2.5 W and 0.34 W respectively. The broad gain bandwidth of the quantum dot material was explored and wavelength tuneability up to 60 nm around 1040 nm, 69 nm around 1180 nm, and 25 nm around 1260 nm was demonstrated.A QD based saturable absorber was used to mode-lock the quantum well SDL, resulting in the first such type of laser with sub-picosecond pulse widths. Pulses with duration of 870 fs at a repetition rate of 896 MHz and wavelength of 1028.5 nm were demonstrated. Pulses were 1.14 times Fourier limited and an average output power of 46 mW was achieved. Finally, quantum well based VECSELs with electrical pumping schemes were tested. The devices were first tested in the cw configuration. Highest output powers up to 60 mW were achieved from such devices. Devices were then tested in mode-locking experiments. Pulsed operation was observed and the measurements indicated 270 ps width pulses with 8 mW average output power at 1.9 GHz repetition rate. All devices operated at 980 nm.This thesis consists of six chapters. In the introductory part of this work, QD based SDLs and their development and applications will be reviewed together with their operational principles. Chapter two will describe the growth, fabrication and preparation of SDL samples. Continuous wave and mode-locked operation results will be presented in chapters three and four. Electrically pumped devices will be presented in chapter five along with experimental results. Conclusions and future prospects will be given at the end of this work. The list of publications which were generated during the studies is included at the beginning of this work.The work presented in thesis was done under the FAST-DOT project. This is a European FP 7 project targeted at the development of compact and low-cost novel quantum dot based laser sources for biophotonic applications.

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Mastrocinque, Ernesto. « Laser welding of Ti6Al4V alloy by disk laser : analysis and optimization ». Doctoral thesis, Universita degli studi di Salerno, 2012. http://hdl.handle.net/10556/352.

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2010 - 2011
Titanium alloys have been successfully applied in many industrial fields because of their better performance and lighter weight than other commonly used structural materials. The conventional welding methods used for titanium alloys are tungsten inert gas (TIG) and plasma arc welding. In recent decades, autogenous processes with highly concentrated energy sources have become popular; these joining processes are laser and electron-beam welding. The power source can be concentrated in very small areas so as to achieve energy densities up to 10,000 times higher than those of the arc processes. Laser welding allows joints to be made with limited distortion. The fullyautomated process, ensures high productivity and high-quality joints. Laser technology is acquiring industrial interest because the electron-beam processes have limitations, such as the need to operate in vacuum, the increased costs and the emission of X-rays. Titanium alloys are widely used in the aircraft industry, because of their high strength-to-weight ratio, corrosion resistance, operating temperature and bonding with composite materials (electrochemical compatibility, similar coefficients of thermal expansion). The criteria for the design, manufacture and operation were changed to obtain structures that are lighter and more efficient than the ones made of aluminum. However, the structures in carbonfiber- reinforced-polymer require the use of metal structures, especially in areas of great concentration of loads. In spite of several advantages, these alloys lead to excessive manufacturing costs related to the cost of the raw materials, the high volumes of waste and the complex and expensive finishing. For these reasons, it is cheaper to produce semi-finished products by welding simpler parts, instead of casting and forming processes; therefore, laser welding can be used due to its high productivity and quality end-products. The aim of the thesis work is to find the better input process parameters values to weld 3 mm and 1 mm Ti6Al4V sheets using a 2 kW Yb:YAG disk laser. Both bead on plate and butt tests have been performed, and the beads quality is characterized in terms of geometric features, porosity content, microstructure, hardness and strength. This work is organized in five chapters. Chapter 1 discusses the principles of operation and the different types of laser including disk laser, used in the experimental part. Chapter 2 presents the properties of titanium and its alloys, highlighting the various fields of application. Chapter 3 presents a review of the different technologies used for welding of titanium alloys, focusing primarily on laser welding and its mechanisms. Chapter 4 describes the titanium alloy, equipment and methodologies used in the experimental work. Finally, Chapter 5 presents the results obtained. [edited by author]
X n.s.

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Rodriguez-Valls, Omar. « Characterization and Modeling of a High Power Thin Disk Laster ». Master's thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2099.

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High power lasers have been adapted to material processing, energy, military and medical applications. In the Laser Plasma Laboratory at CREOL, UCF, high power lasers are used to produce highly ionized plasmas to generate EUV emission. This thesis examines the quality of a recently acquired high power thin disk laser through thermal modeling and beam parameter measurements. High power lasers suffer from thermally induced issues which degrade their operation. Thin disk lasers use an innovative heat extraction mechanism that eliminates the transverse thermal gradient within the gain medium associated with thermal lensing. A thorough review of current thin disk laser technology is described. Several measurement techniques were performed on a high power thin disk laser. The system efficiencies, spectrum, and temporal characteristics were examined. The laser was characterized in the far-field regime to determine the beam quality and intensity of the laser. Laser cavity simulations of the thin disk laser were performed using LASCAD. The induced thermal and stress effects are demonstrated. Simulated output power and efficiency is compared to those that have been quantified experimentally.
M.S.E.E.
School of Electrical Engineering and Computer Science
Engineering and Computer Science
Electrical Engineering MSEE

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6

Baker, Caleb W., et Caleb W. Baker. « Practical Design and Applications of Ultrafast Semiconductor Disk Lasers ». Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/625900.

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Vertical External Cavity Surface Emitting Lasers (VECSELs) have become well established in recent years for their design flexibility and promising power scalability. Recent efforts in VECSEL development have focused heavily on expanding the medium into the ultrafast regime of modelocked operation. Presented in this thesis is a detailed discussion regarding the development of ultrafast VECSEL devices. Achievements in continuous wave (CW) operation will be highlighted, followed by several chapters detailing the engineering challenges and design solutions which enable modelocked operation of VECSELs in the ultrafast regime, including the design of the saturable absorbers used to enforce modelocking, management of the net group delay dispersion (GDD) inside the cavity, and the design of the active region to support pulse durations on the order of 100 fs. Work involving specific applications - VECSELs emitting on multiple wavelengths simultaneously and the use of VECSEL seed oscillators for amplification and spectral broadening - will also be presented. Key experimental results will include a novel multi-fold cavity design that produced record-setting peak powers of 6.3 kW from a modelocked VECSEL, an octave-spanning supercontinuum with an average power of 2 W generated using a VECSEL seed and a 2-stage Yb fiber amplifier, and two separate experiments where a VECSEL was made to emit on multiple wavelengths simultaneously in modelocked and highly stable CW operation, respectively. Further, many diagnostic and characterization measurements will be presented, most notably the in-situ probing of a VECSEL gain medium during stable modelocked operation with temporal resolution on the order of 100 fs, but also including characterization of the relaxation rates in different saturable absorber designs and the effectiveness of different methods for managing the net GDD of a device.

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Scheller, Maik, Caleb W. Baker, Stephan W. Koch et Jerome V. Moloney. « Dual-Wavelength Passively Mode-Locked Semiconductor Disk Laser ». IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2016. http://hdl.handle.net/10150/621738.

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A dual-wavelength mode-locked semiconductor vertical-external-cavity-surface-emitting laser is demonstrated. A semiconductor saturable absorber mirror allows for simultaneous mode locking of pulses centered at two center wavelengths with variable frequency spacing. The difference-frequency control is achieved with an intracavity etalon. Changing the finesse of the etalon enables the adjustment of the pulse duration between 6 and 35 ps. The emitted two-color pulses are modulated by a beat frequency in the terahertz range. Self-starting mode-locking with 0.8-W average output power is demonstrated.

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Alfieri, Vittorio. « Disk laser welding of metal alloys for aerospace ». Doctoral thesis, Universita degli studi di Salerno, 2013. http://hdl.handle.net/10556/857.

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2011 - 2012
Laser welding is the logical processing solution to accomplish different needs. Improvements at the design stage are actually aimed to remove any mechanical fastening, thus moving towards a technology which would not increase the joint thickness; moreover, a number of benefits in comparison with conventional welding methods are provided when considering laser beams, since deep penetration is achieved and the energy is effectively used where needed, thus melting the interface to be joined rather than excessively heating up the base metal, which would suffer from thermal distortion and degradation of metallurgical properties otherwise. Further advantages are achieved in laser welding with thin disk sources, since high output power, high efficiency and good beam quality are simultaneously delivered, unlike traditional laser systems; costs are significantly reduced in comparison with lamp-pumped laser systems. As a consequence, specific interest is shown in aerospace where strict specifications apply. Nevertheless, a number of issues must be addressed, depending on the material to be welded, as many variables and sub processes concerning fusion and vaporization are involved in laser welding and a delicate balance between heating and cooling is in place within a spatially localized volume. Therefore, extensive studies are required to manage both the stability and the reproducibility of the overall process, before introducing any change in industrial environments. Methods, experimental results and discussions concerning laser welding of common metal alloys for aerospace are provided in this Ph.D. thesis. A general view of applications and basic advantages of laser welding is first given, with mention to diagnostics and safety. Hence, the principles of laser emission are examined, with respect to the architecture of the sources, beam geometry, quality and efficiency, in order to better portray the benefits of a thin disk laser concept. Processing dynamics of laser welding are explained afterward, referring to conduction and key-hole mode, instability, gas supply and leading governing parameters such as laser power, welding speed, defocusing and beam angle to be considered in the experimental work. Procedures are provided for proper bead characterization, from preliminary examinations including non destructive tests such as fluorescent penetrant inspections and radiographic tests, to sample preparation and eventual mechanical assessment in terms of tensile strength and Vickers micro hardness in the fused zone. A straightforward description of the design of experiment approach and the response surface methodology is given, so to introduce the testing method to be taken, as well as the steps for data elaboration via statistical tools. Hence, four case studies about metal aerospace alloys are presented and discussed in their common seam configuration: autogenous butt and overlapping welding of aluminum alloy 2024; autogenous butt welding of titanium alloy Ti-6Al-4V; dissimilar butt welding of Haynes 188 and Inconel 718; dissimilar overlapping welding of Hastelloy X and René 80. All of the welding tests were conducted at the Department of Industrial Engineering at the University of Salerno; a Trumpf Tru-Disk 2002 Yb:YAG disk-laser source with a BEO D70 focusing optics, moved by an ABB IRB 2004/16 robot was employed. When needed, additional tests for the purpose of specific bead characterization were conducted by Avio and Europea Microfusioni Aerospaziali. As general procedure for each topic, the operating ranges to be examined are found via preliminary trials in combination with the existing literature on the subject. Then, special consideration is given to the processing set-up, the resulting bead profile, possible imperfections, defects and overall features; consistent constraint criteria for optimization of the responses are chosen on a case-by-case basis depending on materials and seam geometry and referring to international standards as well as customer specifications for quality compliance. Optimal combinations of the input welding parameters for actual industrial applications are eventually suggested, based on statistical tools of analysis. Convincing reasons are provided to give grounds to improvements in real applications. Moreover, based on the results, a proper device for bead shielding, to be conveniently adjusted depending on both geometry and materials to be welded has been designed, produced and patented (SA2012A000016). As concerning aluminum welding, a comprehensive description is given for laserrelated issues: reflectivity and thermal conductivity influence on the material response is illustrated; the porosity evolution is discussed with respect to thermal input and defocusing; a theory for softening in the fused zone is provided through energy dispersive spectrometry and estimations of magnesium content in the crosssection. Optimization is performed for butt configuration of 1.25 mm thick sheets; the discussion about the interactions among the governing factors is deepen with reference to overlapping welding. With respect to titanium welding, optimization is performed for 3 mm thick butt welding; the resulting micro structure in the weld is discussed since it is thought to be closely related to the mechanical properties. In particular, special care is taken of the grain size as a function of the governing factors. Dissimilar welding of super alloys is considered for gas turbine components; for this specific purpose, laser welding is expected to offer a valid alternative to arc and electron beam welding, whose weaknesses are pointed out. Given their actual application in the engine, Haynes 188 and Inconel 718 are examined in butt welding configuration, whilst an overlapping geometry is preferred for Hastelloy X and René 80. Considerable tolerances are matched, thus promoting the suggested range of the operating variables. [edited by author]
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Sickinger, Daniel. « Development of a Thulium Germanate Thin Disk Laser Prototype ». Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/613444.

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A Thulium Germanate thin disk laser prototype is developed and its potential applications are discussed. Unfortunately, the thin disk gain material for the CW prototype was unable to lase due to thermal limitations within the disk. However, a CW output power model and a physical pump chamber module have been developed, along with the supporting Zemax models and alignment procedures so other gain materials and future improvements can be tested.

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Innerhofer, Edith. « High average power Yb:YAG thin disk laser and its application for an RGB laser source / ». Zürich, 2005. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=16108.

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Livres sur le sujet "Disk laser"

1

B, Carlin Donald, Connolly J. C et Langley Research Center, dir. Linear laser diode arrays for improvement in optical disk recording. Hampton, Va : Langley Research Center, 1990.

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Choy, Daniel S. J. Percutaneous laser disc decompression : A practical guide. New York : Springer, 2011.

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3

Grigsby, Mason. COLD, the report on computer output to laser disk : Trends and opportunities in the COLD market. Westport, CT : Image Pub., 1993.

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Grigsby, Mason. COLD, the next generation : The report on computer output to laser disk : trends and opportunities in the COLD market. Westport, CT : Image Publishing, 1996.

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Grigsby, Mason. COLD, the next generation : the report on computer output to laser disk : trends and opportunities in the COLD market. Westport, CT : Image Publishing, 1998.

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6

B, Carlin Donald, Connolly J. C et United States. National Aeronautics and Space Administration. Scientific and Technical Information Division., dir. Linear laser diode arrays for improvement in optical disk recording for space stations. [Washington, DC] : National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1990.

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LeVitus, Bob. Dr. Macintosh : Tips, techniques, and advice on mastering the Macintosh. Reading, Mass : Addison-Wesley Pub. Co., 1989.

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LeVitus, Bob. Dr. Macintosh : How to become a Macintosh power user. 2^e éd. Reading, Mass : Addison-Wesley Pub. Co., 1992.

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Okhotnikov, Oleg G., dir. Semiconductor Disk Lasers. Weinheim, Germany : Wiley-VCH Verlag GmbH & Co. KGaA, 2010. http://dx.doi.org/10.1002/9783527630394.

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Okhotnikov, Oleg G. Semiconductor disk lasers : Physics and technology. Weinheim : Wiley-VCH, 2010.

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Chapitres de livres sur le sujet "Disk laser"

1

Weik, Martin H. « laser disk ». Dans Computer Science and Communications Dictionary, 874. Boston, MA : Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_9959.

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Unger, P. « 15.2 Optically pumped semiconductor disk lasers ». Dans Laser Systems, 236–44. Berlin, Heidelberg : Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-14177-5_16.

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Apollonov, Victor V. « Mono-module Disk Laser ». Dans Springer Series in Optical Sciences, 145–55. Cham : Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-10753-0_15.

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Sahul, Miroslav, Milan Turňa et Martin Sahul. « Welding of Dissimilar Light Metals by Disk Laser ». Dans Magnesium Technology 2014, 301–5. Cham : Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-48231-6_58.

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Sahul, Miroslav, et Milan Turňa. « Welding of Dissimilar Light Metals by Disk Laser ». Dans Magnesium Technology 2014, 301–5. Hoboken, NJ, USA : John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118888179.ch58.

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Sahul, Miroslav, et Martin Sahul. « Study of ZE10 Magnesium Alloy Welded Joints Produced with Disk Laser ». Dans Magnesium Technology 2016, 103–7. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48114-2_22.

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Kromine, A. K., P. A. Fomitchov, S. Krishnaswamy et J. D. Achenbach. « Scanning Laser Source Technique and its Application to Turbine Disk Inspection ». Dans Review of Progress in Quantitative Nondestructive Evaluation, 381–86. Boston, MA : Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-4791-4_47.

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Sahul, Miroslav, et Martin Sahul. « Study of ZE10 Magnesium Alloy Welded Joints Produced With Disk Laser ». Dans Magnesium Technology 2016, 103–7. Hoboken, NJ, USA : John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119274803.ch22.

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Gao, Xiangdong, Runlin Wang, Yingying Liu et Yongchen Yang. « Analysis of Metallic Plume Image Characteristics During High Power Disk Laser Welding ». Dans Lecture Notes in Electrical Engineering, 225–40. Dordrecht : Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6818-5_17.

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Wu, Lan Ying, Huai Guo Ban, Jing Deng et Rui Guo. « An Actuator Laser of Optical Disk Drive High-Frequency Electromagnetic Vibrations Characteristic Analysis ». Dans Materials Science Forum, 1135–38. Stafa : Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-462-6.1135.

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Actes de conférences sur le sujet "Disk laser"

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Saarinen, Esa J., Elena Vasileva, Oleg Antipov, Jussi-Pekka Penttinen, Miki Tavast, Tomi Leinonen et Oleg G. Okhotnikov. « Ceramic Tm:Lu2O3 Disk Laser Pumped with a Semiconductor Disk Laser ». Dans Advanced Solid State Lasers. Washington, D.C. : OSA, 2013. http://dx.doi.org/10.1364/assl.2013.jth2a.48.

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Kouznetsov, Dmitrii, Jean-François Bisson et Kenichi Ueda. « Scaling Laws of Disk Lasers ». Dans Laser Science. Washington, D.C. : OSA, 2007. http://dx.doi.org/10.1364/ls.2007.ltue6.

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Albrecht, George F., Steven B. Sutton, E. V. George, Walter R. Sooy et William F. Krupke. « Heat capacity disk laser ». Dans High-Power Laser Ablation, sous la direction de Claude R. Phipps. SPIE, 1998. http://dx.doi.org/10.1117/12.321589.

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Huegel, Helmut, et Willy L. Bohn. « Solid state thin disk laser ». Dans Twelfth International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference. SPIE, 1998. http://dx.doi.org/10.1117/12.334426.

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Schlueter, Holger, Viorel Negoita, John Hostetler, David Havrilla, Juergen Stollhof, Rüdiger Brockmann, Alexander Killi et al. « Diode laser pumping of thin disk lasers ». Dans ICALEO® 2007 : 26th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. Laser Institute of America, 2007. http://dx.doi.org/10.2351/1.5061078.

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Johannsen, I., S. Erhard, D. Müllier, C. Stewen, A. Giesen et K. Contag. « Nd:YAG thin disk laser ». Dans Advanced Solid State Lasers. Washington, D.C. : OSA, 2000. http://dx.doi.org/10.1364/assl.2000.tub7.

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Song, Yanrong, Peng Zhang, Jinrong Tian et Xinping Zhang. « 1043nm semiconductor disk laser ». Dans SPIE LASE, sous la direction de Mark S. Zediker. SPIE, 2010. http://dx.doi.org/10.1117/12.842228.

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Chivel, Yu, I. Niconchuk et D. Zatiagin. « Short pulse disk laser ». Dans International Conference on Lasers, Applications, and Technologies '07, sous la direction de Vladislav Panchenko, Vladimir Golubev, Andrey Ionin et Alexander Chumakov. SPIE, 2007. http://dx.doi.org/10.1117/12.753288.

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Cao, Wei-Lou, Mei-Zhen Zhang et Qinhao Chen. « Clear aperture 40-mm Nd:YAG disk laser ». Dans OSA Annual Meeting. Washington, D.C. : Optica Publishing Group, 1986. http://dx.doi.org/10.1364/oam.1986.fk6.

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During the past few years, much effort has been put into developing solid-state slab lasers. Due to a limitation of the cross area of slab laser, the output power was restricted. Using the technology of the Nd:Yglass disk laser which is often used in laser fusion systems, a 40-mm clear aperture Nd:YAG disk laser has been built in our laboratory.

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Dandarov, Anton, Ivelin Bakalski et Zlatan Djurelov. « Investigation on laser microprocessing of magnetic disk ». Dans Laser Optics, sous la direction de Artur A. Mak. SPIE, 1994. http://dx.doi.org/10.1117/12.183135.

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Rapports d'organisations sur le sujet "Disk laser"

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Berndt, V. L. Lessons learned in procuring a laser optical disk system. Office of Scientific and Technical Information (OSTI), mai 1993. http://dx.doi.org/10.2172/10177066.

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Hunt, J., R. Boben, R. Blocker, J. Clark, M. Henesian, J. Victoria, S. Mayo et al. Janus Upgrade using brewster angle disk amplifier technology. [Janus laser system]. Office of Scientific and Technical Information (OSTI), octobre 1990. http://dx.doi.org/10.2172/6078951.

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Eaton, J. K. Experimental investigation of the three-dimensional boundary layer on a rotating disk. Progress report. Office of Scientific and Technical Information (OSTI), mai 1990. http://dx.doi.org/10.2172/10157481.

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Dvornikov, D., E. Walker, P. Rentzepis et S. Esener. Multi-Layer Worm Disk with Parallel Recording and Read-Out for High Capacity Storage. Fort Belvoir, VA : Defense Technical Information Center, avril 2003. http://dx.doi.org/10.21236/ada413850.

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Eaton, J. K. Structure and modeling of the three dimensional boundary layer on a rotating disk. Final report. Office of Scientific and Technical Information (OSTI), décembre 1996. http://dx.doi.org/10.2172/453492.

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Eaton, J. K. Structure and modelling of the three-dimensional boundary layer on a rotating disk : Progress report. Office of Scientific and Technical Information (OSTI), décembre 1993. http://dx.doi.org/10.2172/10134351.

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Bauer, Andrew. In situ and time. Engineer Research and Development Center (U.S.), décembre 2022. http://dx.doi.org/10.21079/11681/46162.

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Large-scale HPC simulations with their inherent I/O bottleneck have made in situ visualization an essential approach for data analysis, although the idea of in situ visualization dates back to the era of coprocessing in the 1990s. In situ coupling of analysis and visualization to a live simulation circumvents writing raw data to disk for post-mortem analysis -- an approach that is already inefficient for today's very large simulation codes. Instead, with in situ visualization, data abstracts are generated that provide a much higher level of expressiveness per byte. Therefore, more details can be computed and stored for later analysis, providing more insight than traditional methods. This workshop encouraged talks on methods and workflows that have been used for large-scale parallel visualization, with a particular focus on the in situ case.

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Eaton, J. K. Experimental investigation of the three-dimensional boundary layer on a rotating disk. Proposal for research and progress report. Office of Scientific and Technical Information (OSTI), janvier 1989. http://dx.doi.org/10.2172/10157479.

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Badia, R., J. Ejarque, S. Böhm, C. Soriano et R. Rossi. D4.4 API and runtime (complete with documentation and basic unit testing) for IO employing fast local storage. Scipedia, 2021. http://dx.doi.org/10.23967/exaqute.2021.9.001.

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This deliverable presents the activities performed on the ExaQUte project task 4.5 Development of interface to fast local storage. The activities have been focused in two aspects: reduction of the storage space used by applications and design and implementation of an interface that optimizes the use of fast local storage by MPI simulations involved in the project applications. In the rst case, for one of the environments involved in the project (PyCOMPSs) the default behavior is to keep all intermediate les until the end of the execution, in case these les are reused later by any additional task. In the case of the other environment (HyperLoom), all les are deleted by default. To unify these two behaviours, the calls \delete object" and \detele le"have been added to the API and a ag \keep" that can be set to true to keep the les and objects that maybe needed later on. We are reporting results on the optimization of the storage needed by a small case of the project application that reduces the storage needed from 25GB to 350MB. The second focus has been on the de nition of an interface that enables the optimization of the use of local storage disk. This optimization focuses on MPI simulations that may be executed across multiple nodes. The added annotation enables to de ne access patters of the processes in the MPI simulations, with the objective of giving hints to the runtime of where to allocate the di erent MPI processes and reduce the data transfers, as well as the storage usage.

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Whirl Analysis of an Overhung Disk Shaft System Mounted on Non-rigid Bearings. SAE International, mars 2022. http://dx.doi.org/10.4271/2022-01-0607.

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Eigenvalues of a simple rotating flexible disk-shaft system are obtained using different methods. The shaft is supported radially by non-rigid bearings, while the disk is situated at one end of the shaft. Eigenvalues from a finite element and a multi-body dynamic tool are compared against an established analytical formulation. The Campbell diagram based on natural frequencies obtained from the tools differ from the analytical values because of oversimplification in the analytical model. Later, detailed whirl analysis is performed using AVL Excite multi-body tool that includes understanding forward and reverse whirls in absolute and relative coordinate systems and their relationships. Responses to periodic force and base excitations at a constant rotational speed of the shaft are obtained and a modified Campbell diagram based on this is developed. Whirl of the center of the disk is plotted as an orbital or phase plot and its rotational direction noted. Finally, based on the above plots, forward and reverse whirl zones for the two excitation types are established.

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