We give on overview of recent advances in collisionally pumped optical field-ionization soft X-ray lasers developed at LOA. Saturated amplification has been achieved on the 5d-5p transition in Xe⁸⁺ at 41.8 nm, and on the 4d-4p transition in Kr⁸⁺ at 32.8 nm. We demonstrate a significant increase of the energy output from the Xe⁸⁺ laser driven within two types of wave-guide. Finally, we present results of a pioneering work aimed to set up and characterize the first true soft X-ray laser chain.
Copyright 2005 Cambridge University Press. T. Mocek, S. Sebban, I. Bettabai, Ph. Zeitoin, G. Faivre, B. Cros, G. Maynard, A. Butler, C.M. McKenna, D.J. Spence, A.J. Gonsalves, S.M.Hooker, V. Vorontzov, S. Hallou, M. Fajardo, S. Kazamias, S. Le Pape, P. Mercere, A.S. Morlens, C. Valentin, and Ph. Balcou, "Progress in optical-field-ionization soft X-ray lasers at LOA", Laser and Particle Beams 23 351 (2005). The original article can be found at http://dx.doi.org/10.10170S0263034605050500.