22 April 1996 Multi-kW supersonic CO laser with high beam quality
Author Affiliations +
Proceedings Volume 2773, Laser Optics '95: Gas Lasers; (1996) https://doi.org/10.1117/12.238513
Event: Laser Optics '95, 1995, St. Petersburg, Russian Federation
An rf-excited gas-dynamically cooled carbon monoxide laser with unstable resonator (M equals 2) has been developed. The extracted laser beam shows an astigmatic phase distortion which is corrected by use of an extracavity cylindrical mirror. A 4.5 kW laser beam with a total divergence of 1.3 mrad is obtained with an efficiency of 9% and a Strehl ration of 0.5. The beam quality is 1.3 times the diffraction limit. First welding experiments on the aluminum alloy AlMgSi1 (6082) show higher penetration depths compared to carbon-dioxide and Nd- YAG laser welding at the same power level. This is a result of the smaller focal spot size with the CO laser leading to higher intensities in the welding zone. The aluminum weld seams obtained with the CO laser are very homogenous and regular at the surface in contrast to the weld seams obtained with the CO laser. The process parameters in CO laser aluminum welding can be changed in a wide range. This is a consequence of the shorter 5 to 5.6 micrometer wavelength compared to the carbon-dioxide laser resulting in a reduced beam- plasma interaction. Spectroscopic investigation of the CO laser induced aluminum welding plasma show a strong decrease of the intensities of Al (II) lines and no appearance of Al (III) lines as in case of carbon-dioxide laser welding of aluminum.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Martin Schellhorn, Martin Schellhorn, Hartwig von Buelow, Hartwig von Buelow, } "Multi-kW supersonic CO laser with high beam quality", Proc. SPIE 2773, Laser Optics '95: Gas Lasers, (22 April 1996); doi: 10.1117/12.238513; https://doi.org/10.1117/12.238513


CO2 Probe Laser With Rapid Wavelength Switching
Proceedings of SPIE (October 20 1977)
High power coaxial CO2 waveguide laser
Proceedings of SPIE (April 04 1997)
Industrial 30 kW CO2 laser with fast axial gas flow...
Proceedings of SPIE (March 29 1996)
Outlook of unstable-waveguide-cavity usage in gas lasers
Proceedings of SPIE (April 22 1996)
Application of a high-power CO laser in aluminum welding
Proceedings of SPIE (March 01 1996)

Back to Top