H - Electricity – 01 – S
Patent
H - Electricity
01
S
345/38
H01S 3/09 (2006.01) H01S 3/038 (2006.01) H01S 3/223 (2006.01) H01S 3/23 (2006.01)
Patent
CA 1159938
ABSTRACT OF THE DISCLOSURE Method for generating laser beams in the 16-µm wavelength range, especially for the U235 isotope separation, using a first CO2 gas laser, the CO2 molecules of which are lifted to the (00°1) energy level by supplying pumping energy, and using a high intensity radiation source radiated into the laser tube, especially a second CO2 laser serving as an injection laser, with the transition (00°1) Image (02°0) for occupying the upper laser level for the 16-µm radiation of the first laser to be stimulated on the bending mode transition (02°0) Image (0110), characterized by the following features: a) The laser gas mixture of the first laser is deep-cooled in a manner known per se, and the laser pumping process is carried out by means of an electric high-energy gas discharge according to the TEA (transversely excited atmospheric pressure laser) principle with at least one TEA-CO2 laser module as element of a 16-µm laser; b) the emission line of the injection laser is tuned in a range which covers the exact transition (00°1) Image (02°0) to a rotation level of the (02°0) level as well as virtual levels (02°0)' at a freely selectable distance from the line center of the exact transition; c) for tuning to a virtual level (02°0)', the emission line of the injection laser is shifted by a fraction of a wave number from the line center of the corresponding transition, and the injection laser is preferably operated as a high-pressure TEA-CO2 laser; d) the injection laser pulses with a leading edge as short as possible, detuned in this manner, are coupled into the 16-µm resonator of the first laser, so that its transition from the (00°1) level takes place to a virtual energy level (02°0)' thus resulting, which is likewise removed by a fraction of a wave number from the real (02°0) level of the CO2 molecules, so that, due to non-linear scattering at this virtual energy level in the transition to the lower (0110) laser level, the CO2 molecules emit light quanta, the wavelengths of which are shifted again by the same fraction of a wave number (the amount of detuning) of the real transition (02°0) Image (0110).
395660
Cirkel Hans-Jurgen
Schmatjko Klaus-Joachim
Fetherstonhaugh & Co.
Kraftwerk Union Aktiengesellschaft
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