co2 laser energy level diagram
The pre-mixed gases are fed continuously into the tube forming the laser cavity. 14.24. This design is considered the variation of the transverse flow design. The RF energy is absorbed with very little temperature rise. The slow axial flow lasers can produce a maximum output of about 500 watts because 75 – 90% of the discharge energy is dissipated in the gas resulting in its overheating and decomposition with consequential fall in output. In a carbon dioxide laser the CO2 molecules are vibrationally excited by an electric discharge across the laser cavity. Content Filtrations 6. In each configuration there is a specific manner in which the gas flows in the tube. Remember that beam diameter for this type of laser varies from 5 to 10mm and the beam divergence is typically 1 to 2 millimeter also efficiency varies from 1 to 10%. It was the first molecular gas laser developed by Indian born American scientist Prof.C.K.N.Pillai. While a slow axial flow laser will deliver about 50 – 70 watts per meter of laser cavity, the fast axial flow laser can generate upto 600 watts per meter. In this mixture the helium and nitrogen work in concert with the CO2 to produce the desired lasing effect. TOS 7. This can be done by cooling the gas. [CDATA[> [CDATA[> Here the tangential blower circulates low pressure CO2 gas around the inside of the laser tube. Copyright 10. By diagram sealed tube design can be shown as: If DC excitation is used with the sealed tube CO2 laser then it is much like constructed as He-Ne gas laser, however it is necessary to have an elaborate cooling system with the laser. The direct vibrational excitation of CO2 by an electric discharge is inefficient. 14.25. Plagiarism Prevention 4. Generally voltages required to maintain this type of operation are extremely high, that is why the TEA designed laser can only be operated in pulsed mode. High absorption of its output wavelengths by many materials. Energy states of CO 2 molecules. //--> The beam divergence of the CO2 gas laser ranges from 1 to 10 milli radians. //-->. In both energy and weapons research, there is good field of application of CO. CO2 lasers have become the workhorse of the material processing industry because of their low cost (below $100 per watt).
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12th November 2018