Pulse behavior of a short pulse discharged TEA CO_2laser

摘要

The studies on a short pulsed TEA (Transversely Excited Atmospheric pressure) CO2 laser pumped by a magnetic pulseexciter are reported. The exciter includes a magnetic pulse compression circuit, which compresses the pulse durationbelow 100 ns. According to our experiments, the maximum output energy of a single pulse can be as high as 2.84 J andthe Full Width at Half Maximum (FWHM) of the laser pulse is 7Ons approximately. The pulse shapes and characteristictimes are measured. The results indicate that the single pulse energy keeps a linear relation with the gas pressure andcharge voltage. And there is an optimized composition that the maximum output pulse energy or shortest pulse width canbe obtained. Based on this free oscillation laser, a tunable TEA CO_2laser is developed. Over 62 laser lines from 9.16 to10.79 ,um have been obtained and the output pulse energy of 10P(20) line is 0.5 J.