A four-section CO2 laser is described which can produce 20 W in fundamental mode during a 1-sec pulse with a frequency tuning range of ±300 MHz. It operates at 200-Torr pressure using sonic axial flow to inhibit the discharge column from filamenting. The input power density is 58 W cm-3 corresponding to an efficien-cy of 2%.
© 1984 Optical Society of America
L. E. Sharp and H. J. Barkley, "Quasi-cw 20-W tunable 1-sec pulse CO2 laser for optical pumping," Appl. Opt. 23, 1395-1398 (1984)