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A design, construction and operation of a stable frequency linetuned, plane-polarized CW CO2 laser are described. The maximum output power of 30W for 10P(20) V-R transitions was obtained. The line tuning of laser wavelength was achieved by using 100line/mm grating. This laser was stabilized by holding the laser cavity fixed using a low thermal expansion quartz rod.
CO2 laser --- CW Lasers --- Line Tuning
In this work, the effect of self-absorption by molecules of the active medium on the output laser power of a low-pressure CW CO2 laser was studied. The effects of discharge current, output coupling and total gas pressure on the output laser power were discussed. It was explained that the self-absorption depends on CO2 concentration, output coupling and discharge current and there is a threshold value for both output coupling and discharge current at which the absorption is clearly effective.
Co2 laser --- CW lasers --- Self-absorption --- Output coupling
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