J. Phys. IV France 11 (2001) Pr2-93-Pr2-98
Hybridly pumped collisional soft X-ray laser in Ne-like sulphurP.V. Nickles1, K.A. Janulewicz1, J.J. Rocca2, F. Bortolotto1, A. Lucianetti1 and W. Wandner1
1 Max Born Institute, Max-Born-Str. 2 A, 12489 Berlin, Germany
2 Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, CO 80523, U.S.A.
We describe an experiment demonstrating XUV amplification following collisional excitation in a discharge-created plasma waveguide irradiated by a picosecond optical laser pulse. A capillary discharge was used to generate a plasma radiation pipe with a radially concave electron density profile. Temporally resolved transmission characteristics and guiding effect have been measured. An intense short laser pulse rapidly heated the electrons, producing amplification in the [MATH] transition of Ne-like S at 60.84 nm. The integrated gain-length product obtained within a 3 cm active medium with a laser energy of 0.46 J was ~6.8. The pump energy depletion has been analysed as well. This new, hybridly pumped soft X-ray laser with the transient gain offers a new way towards efficient tabletop coherent XUV sources.
© EDP Sciences 2001