We demonstrate a neonlike argon-ion x-ray laser, using a short-pulse laser-irradiated gas puff target. The gas puff target was formed by pulsed injection of gas from a high-pressure solenoid valve through a nozzle in the form of a narrow slit and irradiated with a combination of long, 600-ps and short, 6-ps high-power laser pulses with a total of 10 J of energy in a traveling-wave excitation scheme. Lasing was observed on the 3<i>p</i> <sup>1</sup><i>S</i><sub>0</sub>→3<i>s</i> <sup>1</sup><i>P</i><sub>1</sub> transition at 46.9 nm and the 3<i>d</i> <sup>1</sup><i>P</i><sub>1</sub>→3<i>p</i> <sup>1</sup><i>P</i><sub>1</sub> transition at 45.1 nm. A gain of 11 cm<sup>-1</sup> was measured on these transitions for targets up to 0.9 cm long.
© 2001 Optical Society of America
Henryk Fiedorowicz, Andrzej Bartnik, James Dunn, Raymond F. Smith, James Hunter, Joseph Nilsen, Albert L. Osterheld, and Vyacheslav N. Shlyaptsev, "Demonstration of a neonlike argon soft-x-ray laser with a picosecond-laser-irradiated gas puff target," Opt. Lett. 26, 1403-1405 (2001)