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Relevant bibliographies by topics / Beam quality, Beam Profile, High power laser

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Academic literature on the topic 'Beam quality, Beam Profile, High power laser'

Author: Grafiati

Published: 6 September 2023

Last updated: 31 July 2025

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Journal articles on the topic "Beam quality, Beam Profile, High power laser"

1

Hou, Guanyu, Lijie Wang, Jian Feng, et al. "Beam Control in an Intracavity Frequency-Doubling Semiconductor Disk Laser." Applied Sciences 9, no. 8 (2019): 1584. http://dx.doi.org/10.3390/app9081584.

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In this paper, we have demonstrated a 1.3 W green laser using a V-shaped intracavity frequency doubling 1036 nm semiconductor disk laser. The beam quality of the fundamental and second harmonic generation (SHG) laser is investigated. It has been found that the output lasers at the fundamental and SHG wavelength both suffer from reduced beam quality along with power scaling. The measured beam profile is elliptical under high power operation. In order to improve the SHG laser beam, an intracavity aperture is employed to control the mode characteristics of fundamental frequency light. By fine-tun

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Nguyen, Thanh-Phuong. "Characterization of High-power DFB-MOPA Diode Lasers Emitting at 1064 nm." Communications in Physics 29, no. 1 (2019): 47. http://dx.doi.org/10.15625/0868-3166/29/1/13221.

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Detail characterization of the such laser diode is important for the applications. Electro-Optical and spectral characteristics of the high power 1064 nm DFB-MOPA lasers are investigated at room temperature as function of injection current. Beam quality is characterized by waist diameter and far-field divergence angle versus average optical output power. Beam propagation ratio M2 is defined at difference intensity levels from lateral beam profile giving more detail laser behaviors at high power.

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Ihama, Masahiro, Yuji Sato, Yuta Mizuguchi, et al. "Suppression of denudation zone using laser profile control in vacuum selective laser melting." Journal of Laser Applications 35, no. 1 (2023): 012004. http://dx.doi.org/10.2351/7.0000749.

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A vacuum selective laser melting method with a beam profile control was developed to fabricate the high quality 3D object. To investigate the quality of 3D fabrication, the denudation zone (DZ) as a quality indicator was evaluated to make a single bead. The main challenge is to clarify the correlation between the DZ and beam profiles. The beam profiles, such as a Gaussian mode, a doughnut mode, and a flat-top mode, were formed in several modes, by a dioptric system with a beam shaper. A stainless steel 316L (SS316L) powder was irradiated in arbitrary pressure to form a single bead, and then th

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LUKISHOVA, SVETLANA G. "NONLINEAR OPTICAL RESPONSE OF CYANOBIPHENYL LIQUID CRYSTALS TO HIGH-POWER, NANOSECOND LASER RADIATION." Journal of Nonlinear Optical Physics & Materials 09, no. 03 (2000): 365–411. http://dx.doi.org/10.1142/s0218863500000212.

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Results from investigations are summarized into: (1) transient refractive and absorptive (two-photon) nonlinearities at 0.532 μm by the Z-scan method, and (2) reflective nonlinearity in the near-IR, of linearly nonabsorbing cyanobiphenyl liquid crystals under nanosecond laser irradiation. (1) For isotropic liquid crystals at the several-nanosecond time scale and several tens-micrometers beam-waist-diameter, transient molecular-reorientation and thermal/density refractive nonlinearities compete in changing the sign of the total transient refractive nonlinearity. For the different, given pulse d

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Yao, Weipeng, Ronan Lelièvre, Tessa Waltenspiel, et al. "Enhanced Energy, Conversion Efficiency and Collimation of Protons Driven by High-Contrast and Ultrashort Laser Pulses." Applied Sciences 14, no. 14 (2024): 6101. http://dx.doi.org/10.3390/app14146101.

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Progress in laser-driven proton acceleration requires increasing the proton maximum energy and laser-to-proton conversion efficiency while reducing the divergence of the proton beam. However, achieving all these qualities simultaneously has proven challenging experimentally, with the increase in beam energy often coming at the cost of beam quality. Numerical simulations suggest that coupling multi-PW laser pulses with ultrathin foils could offer a route for such simultaneous improvement. Yet, experimental investigations have been limited by the scarcity of such lasers and the need for very str

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Coroado, Julio, Supriyo Ganguly, Wojciech Suder, Stewart Williams, Sonia Meco, and Goncalo Pardal. "Selection of parameters in nanosecond pulsed wave laser micro-welding." International Journal of Advanced Manufacturing Technology 115, no. 9-10 (2021): 2929–44. http://dx.doi.org/10.1007/s00170-021-07251-8.

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AbstractThe digital control of the latest nanosecond pulsed wave (PW) fibre lasers allows very high flexibility in controlling the application of the total energy to a workpiece, which brings several advantages to the joining process. By choosing different pulse shapes in different spatial profiles, it is possible to apply low energy per pulse with high precision and accuracy resulting in lower heat input. Since the energy of each pulse is insufficient to generate melting, these lasers operate at very high pulse repetition frequencies near continuous wave (CW) regime. Nevertheless, the peak po

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Krainara, Siriwan, Shuya Chatani, Heishun Zen, Toshiteru Kii, and Hideaki Ohgaki. "Manipulation of Laser Distribution to Mitigate the Space-Charge Effect for Improving the Performance of a THz Coherent Undulator Radiation Source." Particles 1, no. 1 (2018): 238–52. http://dx.doi.org/10.3390/particles1010018.

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A THz coherent undulator radiation (THz-CUR) source has been developed at the Institute of Advanced Energy, Kyoto University. A photocathode Radio-Frequency (RF) gun and a bunch compressor chicane are used for generating short-bunch electron beams. When the electron beam energy is low, the space-charge effect strongly degrades the beam quality, such as the bunch length and the energy spread at the high bunch charge condition at around 160 pC, and results in the reduction of the highest frequency and the maximum radiated power of the THz-CUR. To mitigate the space charge effect, we have investi

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Nahr, Florian, Dominic Bartels, Richard Rothfelder, and Michael Schmidt. "Influence of Novel Beam Shapes on Laser-Based Processing of High-Strength Aluminium Alloys on the Basis of EN AW-5083 Single Weld Tracks." Journal of Manufacturing and Materials Processing 7, no. 3 (2023): 93. http://dx.doi.org/10.3390/jmmp7030093.

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The commonly used Gaussian intensity distribution during the laser-based processing of metals can negatively affect melt pool stability, which might lead to defects such as porosity, hot cracking, or poor surface quality. Hot cracking is a major factor in limiting production rates of high-strength aluminium alloys in laser-based processes such as welding or the powder bed fusion of metals (PBF-LB/M). Going away from a Gaussian intensity distribution to ring-shaped profiles allows for a more even heat distribution during processing, resulting in more stable melt pools and reduced defect formati

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Morimoto, Junji, Yutaka Katoh, Shinji Fukuhara, Nobuyuki Abe, Masahiro Tsukamoto, and Shigeru Tanaka. "Micro-Hardening of Carbon Steel with a Direct Diode Laser." Solid State Phenomena 118 (December 2006): 197–200. http://dx.doi.org/10.4028/www.scientific.net/ssp.118.197.

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Surface treatments, surface modification and surface engineering are required to improve the wear resistance, erosion resistance, friction resistance and corrosion protection. Transformation hardening of metals has been used since ancient times to increase the hardness and thereby vastly reduce the wear rate of metal surfaces in use. Today several processes are in use to achieve the controlled heating and rapid cooling required for transformation process. Transformation hardening is one of the most attractive processes for high power diode lasers, since their moderate beam quality and their lo

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Laptev, Alexei V., Gleb V. Kuptsov, Vladimir A. Petrov, and Victor V. Petrov. "ASTIGMATISM COMPENSATION IN BLOCK OF TEMPORAL BROADENING OF PULSE FOR PUMP CHANNEL OF HIGH POWER LASER SYSTEM." Vestnik SSUGT (Siberian State University of Geosystems and Technologies) 25, no. 4 (2020): 205–12. http://dx.doi.org/10.33764/2411-1759-2020-25-4-205-212.

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A high peak and high average power femtosecond laser system based on media doped with Yb3+ ions is being developed at the Institute of Laser Physics of the SB RAS. For efficient laser amplification and to avoid optical damage is actually to compensate wave front distortion caused by grating astigmatism in pump channel. Based on theory of propagation of gaussian beam in space and through optical elements the calculation of optimal parameters of two lenses telescope and comparison with experimental data has been performed. The obtained results can be used for decrease of astigmatic effect on bea

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Dissertations / Theses on the topic "Beam quality, Beam Profile, High power laser"

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Lang, Lei. "Investigation of optical filtering techniques for improving the beam quality of high-power semiconductor laser diodes." Thesis, University of Nottingham, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.546489.

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Zeghuzi, Anissa. "Analysis of Spatio-Temporal Phenomena in High-Brightness Diode Lasers using Numerical Simulations." Doctoral thesis, Humboldt-Universität zu Berlin, 2020. http://dx.doi.org/10.18452/22016.

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Breitstreifenlaser haben eine breite Emissionsapertur, die es ermöglicht eine hohe Ausgangsleistung zu erreichen. Gleichzeitig führt sie jedoch zu einer Verringerung der lateralen Strahlqualität und zu ihrem nicht-stationären Verhalten. Forschung in diesem Gebiet ist anwendungsgetrieben und somit ist das Hauptziel eine Erhöhung der Brillanz, die sowohl die Ausgangsleistung als auch die laterale Strahlqualität beinhaltet. Um die zugrunde liegenden raumzeitlichen Phänomene zu verstehen und dieses Wissen zu nutzen, um die Kosten der Brillanz-Optimierung zu minimieren, ist ein selbst-konsistentes

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Panda, Binodbihari. "A simple method for measurement of high power, inline beam quality of high-power lasers." Thesis, 2020. https://etd.iisc.ac.in/handle/2005/4793.

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Over the past few decades, applications of high-power fiber laser in the area of material processing, medicine, defence, high precision micro-machining etc., is rapidly increasing. The primary reason behind thriving applications is the exceptional power scaling which is due to unique advantages like better thermal management, compact size, cost effectiveness, high quantum efficiency and excellent beam quality. High power fiber laser has a gain medium which is a long cylindrical geometry of optical fiber and thus, provides a high surface to volume ratio. The heat generated during lasing is dis

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Cai, Yu-Liang, and 蔡宇亮. "Improving the beam quality of high power laser field and the application on laser drilling." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/86657528133454940210.

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碩士<br>國立清華大學<br>物理系<br>100<br>In amplification of high-power laser, the high-spatial-frequency components are generated usually, causing the defect in laser beam profile. Therefore, we design an optical spatial filter to improve the beam profile of narrow-band Nd:YAG laser in our experimental system. According Fourier optics, Fourier power spectrum is produced in the focal plane of lens. The higher spatial-frequency components are located at the position far from optical axis. Thus, an aperture with proper size can be used to remove high-spatial-frequency noise so that the beam profile is impr

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Book chapters on the topic "Beam quality, Beam Profile, High power laser"

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Schildbach, K. "Resonator Design and Beam Quality of High Power YAG-Lasers." In Laser/Optoelektronik in der Technik / Laser/Optoelectronics in Engineering. Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-83174-4_69.

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Bakker, J., and J. G. van der Laan. "A Diagnostic Device for Beam Profile Measurements of Pulsed High Power Solid State Lasers." In Laser/Optoelektronik in der Technik / Laser/Optoelectronics in Engineering. Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-48372-1_92.

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Eichler, Hans J., Andreas Haase, Baining Liu, and Jörg Schwartz. "Phase-Conjugating SBS Mirrors for Realisation of High-Power Laser Systems with Diffractation-Limited Beam Quality." In Laser in Forschung und Technik / Laser in Research and Engineering. Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-80263-8_161.

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Blanco-Filgueira, Beatriz, Tamara Delgado, Andrea Gregores Coto, et al. "Synthetic Data for AI-Powered Ultrafast Laser Based Micro-structuring Method Description." In Lecture Notes in Mechanical Engineering. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-86489-6_6.

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Abstract High-power ultrashort pulse lasers (USPLs) represent a sustainable alternative for industrial surface processing. Laser Surface Texturing (LST) allows modification of surface properties such as mechanical, chemical or optical properties. The adoption of USPLs in industry will enable the surface functionalization of large 3D parts through the LST process. However, a real exploitation of USPLs still faces limitations related to high processing resolution, quality, productivity, and the need for expert knowledge in laser micro-structuring strategies. It is crucial to increase maturity, r

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Komori, Hiroshi, Hidetomi Ochi, Toshihiro Nishisaka, et al. "High-power high beam quality ArF laser." In Laser and Ion Beam Modification of Materials. Elsevier, 1994. http://dx.doi.org/10.1016/b978-0-444-81994-9.50044-0.

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Jin, Hong, Seong Ku, Jin Woo, Jae Sung, and Sangwoo Park. "Stimulated Brillouin Scattering Phase Conjugate Mirror and its Application to Coherent Beam Combined Laser System Producing a High Energy, High Power, High Beam Quality, and High Repetition Rate Output." In Advances in Lasers and Electro Optics. InTech, 2010. http://dx.doi.org/10.5772/8640.

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Conference papers on the topic "Beam quality, Beam Profile, High power laser"

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Xie, Shiyong, caili wang, hua cai, et al. "A tunable 1319 nm laser with high power and high beam quality." In Laser Technology and Applications, edited by Pu Zhou. SPIE, 2024. https://doi.org/10.1117/12.3047647.

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Aoki, Takeshi, Yuhki Itoh, Kosuke Fujii, et al. "High-power high-beam-quality 1550-nm-wavelength InP-based photonic-crystal surface-emitting laser." In Novel In-Plane Semiconductor Lasers XXIV, edited by Alexey A. Belyanin and Peter M. Smowton. SPIE, 2025. https://doi.org/10.1117/12.3037797.

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Tatum, Jim A., Roman Strozewski, Harvey B. Serreze, and Duncan L. MacFarlane. "Beam quality in high-power visible-region diode lasers." In OSA Annual Meeting. Optica Publishing Group, 1993. http://dx.doi.org/10.1364/oam.1993.fcc.4.

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Applications of visible diode lasers such as laser pumping, plastic fiber optics, optical storage, and laser printing rely on the ability to control the spatial profile and precise positioning of laser radiation.

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Somkuarnpanit, S., D. Su, D. R. Hall, and J. D. C. Jones. "High-quality CO2 laser beam delivery using dielectric-coated metallic hollow waveguides." In The European Conference on Lasers and Electro-Optics. Optica Publishing Group, 1994. http://dx.doi.org/10.1364/cleo_europe.1994.cthi21.

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Over the past decade, a number of different types of hollow waveguides have been used for the delivery of CO2 laser radiation.1-3 However, much of the previous work has been concentrated on beam attenuation and the power transmission characteristics of the waveguide, whereas to take full advantage of the available CO2 laser technology, i.e., a combination of high power and high beam quality, it is necessary to try to preserve beam quality in the passage of the beam through the fibre. The principal object of this paper is to investigate the transmission properties of hollow wave guides for the

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Perrone, M. R., and D. Diso. "Time evolution of the beam quality factor in Gaussian cavities of different length." In The European Conference on Lasers and Electro-Optics. Optica Publishing Group, 1998. http://dx.doi.org/10.1364/cleo_europe.1998.ctui16.

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The improvement of the optical quality of the laser radiation delivered by high-power excimers is strongly demanded to achieve a greater utilization of their laser energy. Moreover, in applications in which excimers are used for precision drilling, cutting and writing diffractive optical elements, laser beams of low divergence and with a quite uniform intensity profile are needed. Recently, plane-parallel cavities with a Gaussian-reflectivity-profile mirror as full reflector have been applied to a XeCl laser and it has been shown that excimer lasers fitted with plane-parallel Gaussian cavities

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Dai, Zheng, and Peter Unger. "Simulation of Beam Filamentation in High-Power Semiconductor Amplifiers." In The European Conference on Lasers and Electro-Optics. Optica Publishing Group, 1996. http://dx.doi.org/10.1364/cleo_europe.1996.cthi30.

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The suppression of beam-profile filamentation is a challenging task for semiconductor laser amplifiers. In recent times, diffraction-limited, high-power amplification up to 5 W CW and 21 W under pulsed operation has been achieved [1]. In order to obtain high-power amplification with good beam quality, we have used the beam propagation method (BPM) to simulate the disturbance of the refractive index variation. In this paper, we will discuss different mechanisms of the beam filamentation and methods to avoid it.

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Wen, Shaoyi, and Yung C. Shin. "Modeling of the Off-Axis High Power Diode Laser (HPDL) Cladding Process." In ASME 2009 International Manufacturing Science and Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/msec2009-84049.

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Off-axis high power diode laser (HPDL) cladding is commonly used for surface quality enhancement such as coating, part repairing, etc. Although some laser cladding models are available in the literature, little has been reported on modeling of powder flow and molten pool for a rectangular beam with side powder injection. In this article, a custom-designed flat nozzle delivers the powder material into a distinct molten pool formed by a high power diode laser (HPDL) with a rectangular beam. A powder model is first presented to reveal the powder flow behavior below the flat nozzle. Key parameters

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Saltarelli, F., D. Koenen, L. Lang, I. J. Graumann, C. R. Phillips, and U. Keller. "Beam quality in high-power thin-disk lasers: influence and measurement of the radial inversion profile." In Advanced Solid State Lasers. OSA, 2019. http://dx.doi.org/10.1364/assl.2019.jm5a.35.

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Kubacki, Frank, Dirk Hauschild, Mikhail Ivanenko, Jens Meinschien, Andreas Bayer, and Vitalij Lissotschenko. "Dynamic Thermal Thin Film Processing of Large Areas With High Power Laser Sources." In ASME 2009 International Manufacturing Science and Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/msec2009-84105.

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High power laser sources are used in various production tools for cutting, welding and hardening of metal parts and patterning, annealing and lithography of flat panel displays, solar cells and microelectronic devices. Beside the right choice of the laser source suitable high performance optical beam delivery and shaping systems are needed for generating the appropriate beam profile and intensity distribution are of high importance for the right processing speed, quality and yield. In addition to the typical laser processes with circular beam shapes LIMO has developed laser sources with line s

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Huonker, Martin, Christoph Tillkorn, Stefan Dorer, and Michael Lang. "Novel optical concept for line beam optics for large area thermal processing." In ICALEO 2018: 37th International Congress on Applications of Lasers & Electro-Optics. Laser Institute of AmericaLIA, 2018. https://doi.org/10.2351/7.0003995.

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With the availability of high-power infrared laser sources, the thermal processing of large area substrates with lasers becomes increasingly attractive. Besides the laser source, one of the core components is the beam shaping optics for the generation of a line-shaped intensity profile with an extreme aspect ratio. We report on a novel optical concept for laser-based large area thermal processing based on the thin disk laser platform providing output power in excess of 10 kW per unit. The most unique feature of this novel modular concept is the capability to precisely combine several optical u

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