Industrial 3 kW CO<sub>2</sub>laser emitting high-quality radiation

Ivanchenko, A. I.; Krasheninnikov, V. V.; Смирнов, А. Л.; Shulyat'ev, Viktor B

doi:10.1070/qe1994v024n07abeh000146

Cited by 4 publications

(5 citation statements)

References 2 publications

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“…Such scheme allowed us to obtain 2 mutually perpendicular waists of the feedback beam of 2 x 0,15 mm. The radiation power in the feedback arm makes up about 10% of the output power (SFUR magnification is 4,5 [3]). In such a way we managed to avoid the optical discharge on the modulator surface.…”

Section: 2 Fast-tuning Oflaser Linementioning

confidence: 99%

“…The relationship between the cavity length L (which is the distance between mirrors 1 and 2), the focal lengths of the spherical mirrors f1 and f2, and the radius a of the aperture of the filtering stop (the centre of which coincides with the shared focal point of the spherical mirrors) are given by the expressions L = f1 + f2 and a = (O,61Xf2)112 [1], where X is the radiation wavelength. The filtering stop also acts as a annular output mirror (3). The radii of curvature of mirrors 1 and 2 are 14,2 m and 3.15 m, which gives 1 = 8,68 m, a = 3,3 mm, and a geometric magnification M = -4,5 (JM = f1/f2).…”

Section: Laser Designementioning

confidence: 99%

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Multifunctional CO 2 laser with average power up to 3 kW and its modern applications

et al. 1996

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A laser has been developed on the basis of the CW CO2 laser with DC pumping and cross gas flow [3J. An optical resonator of the laser has been developed on the SFUR (Self Filtering Unstable Resonator) scheme [1]. High beam quality is provided by this scheme (full angle divergence is 0,7 mrad on 0,86 power level at beam diameter 30mm).The laser generates 3 kW output power without any additional equipment. Besides, it is equiped by four accesory units in a feedback arm to provide a variety of operating modes.1 . Single-frequency CW mode with capability of monotone line tuning in bands 9,4 microns and 10,4 microns (about 70 lines in all) with maximum output power up to 2,6 kW at line 10P20 and per-unite frequency instability ofthe order of 10 to the minus 7th. As it has been shown, there is a possibility to reduce a laser line width to 50 kHz. A mode with rapid tuning of the generation line (with about 1 microsec transition time) in combination with anopportunity to form any given spectral-temporal sequence. The generation spectrum and output power are the same, as in mode 1.3 . Repetition-rate Q-switching mode with high peak power (up to 800 kW) and the average one (up to 2,8 kW) with pulse repetition rate control in the range of 1 -100 kHz. 4. The repetition-rate Q-switching mode in combination with line-tuning (such as in mode 1) has been developed for selective photochemistry and laser isotop separation.The results of the applications of the laser with repetition rate mode to producing of a new variety of gas dischargepowerful optical pulsating discharge are presented.

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Section: 2 Fast-tuning Oflaser Linementioning

confidence: 99%

Section: Laser Designementioning

confidence: 99%

Multifunctional CO 2 laser with average power up to 3 kW and its modern applications

et al. 1996

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“…The promising future of a self-filtering resonator (SFUR, [13]) applied for the powerful СО 2 lasers is shown in [11,12]. The SFR allows to generate an emission beam with the quality approaching the ТЕМ 00 mode, but at the power about three times higher than the power of the laser with the stable single -mode (ТЕМ 00 ) resonator of the same length.…”

Section: Introductionmentioning

confidence: 99%

Development of resonators for high-power CO 2 lasers

Orishich

Shulyat'ev

Grachev

et al. 2007

International Conference on Lasers, Applications, and Technologies 2007: High-Power Lasers and Applications

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A brief review is made for the schemes of optical resonators for the generation of a high-quality beam in high-power CO 2 lasers. The main results of the self-filtering resonator application in the industrial laser are presented. The selffiltering resonator is compared to the stable resonator by the output beam characteristics, aberration sensitivity, and laser cut characteristics by the example of steel cutting.

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“…To resolve this contradiction, Gobbi and Reali [5] proposed to use a self-filtered unstable resonator (SFUR) in the industrial CO 2 -laser. By using such a resonator, the authors of [6][7][8] managed to obtain a laser power higher than that in a laser with a single-mode (TEM 00 ) resonator of the same length and to retain the beam quality corresponding to a laser with a single-mode resonator.…”

mentioning

confidence: 98%

“…To improve the cutting technology, we used an automated industrial laser system developed at the Khristianovich Institute of Theoretical and Applied Mechanics of the Siberian Division of the Russian Academy of Sciences on the basis of a continuous CO 2 -laser with a power up to 8 kW [9][10][11]. The laser includes a multipass self-filtered resonator capable of providing high-power radiation with a diverging factor close to the diffraction value [6][7][8].…”

mentioning

confidence: 99%

Specific features of laser cutting of steel sheets and monitoring of sample quality after laser influence

Данилов

Зуев

Кузнецова

et al. 2006

J Appl Mech Tech Phys

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An automated laser system with an 8-kW quantum generator with the beam quality not worse than that of a single-mode laser is described. The possibility of using such a system in procurement production for cutting carbon and stainless steel sheets is demonstrated. The quality control of the blank material shows that the properties of the latter satisfy appropriate standards.Key words: industrial gas lasers, self-filtered resonators, gas-laser cutting of metal sheets, technological parameters, structure and properties of blanks.Introduction. Among laser technologies currently used in machine-building branches of industry, gaslaser cutting of metal and nonmetal materials has found the widest application [1-3]. The use of laser cutting in procurement production turned out to be most effective [1]. A wide range of thicknesses and grades of materials being cut and almost arbitrary parameters of blanks being cut allow manufacturing blanks of various types, sizes, and geometry.The main advantages of laser cutting are as follows: -improvement of processing quality owing to the minimum area of thermal influence, reduction of heatinduced strains, absence of the force action on the article; -higher processing rate (severalfold higher than that in conventional methods of mechanical treatment); -severalfold reduction of time needed for the preparatory stage of production in the case new articles are to be produced; -higher material utilization rate owing to the use of optimal cutting patterns; -high quality of cutting of structural steels, which often allows butt welding without prior mechanical treatment;-no displacements of the cut edges; -possibility of producing articles with notches in the form of acute angles, junctions without radii, and thin bridge connections (less than 1-2 mm thick), as well as small-diameter orifices (in contrast to die-cutting by universal circular tools).Using the laser-cutting technology, one can cut sheeted materials over a complicated contour with accuracy ranging from 100 to several micrometers.Advanced laser cutting systems allow cutting thin-sheeted materials with a velocity up to 120 m/min with an error smaller than 100 µm. To reach a maximum possible thickness of sheets being cut and a maximum possible cutting velocity, the laser power should be increased; therefore, the technology of laser cutting with a power of 5 to 6 kW has been recently conquered in industry.

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Industrial 3 kW CO₂laser emitting high-quality radiation

Cited by 4 publications

References 2 publications

Multifunctional CO 2 laser with average power up to 3 kW and its modern applications

Multifunctional CO 2 laser with average power up to 3 kW and its modern applications

Development of resonators for high-power CO 2 lasers

Specific features of laser cutting of steel sheets and monitoring of sample quality after laser influence

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Industrial 3 kW CO2laser emitting high-quality radiation

Cited by 4 publications

References 2 publications

Multifunctional CO 2 laser with average power up to 3 kW and its modern applications

Multifunctional CO 2 laser with average power up to 3 kW and its modern applications

Development of resonators for high-power CO 2 lasers

Specific features of laser cutting of steel sheets and monitoring of sample quality after laser influence

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Industrial 3 kW CO₂laser emitting high-quality radiation