Progress on collisionally pumped optical-field-ionization soft x-ray lasers by Sebban, S, Mocek, T, Bettaibi, I, Cros, B, Maynard, G, Butler, A, Gonzalves, A, McKenna, C, Spence, D, Hooker, S, Upcraft, L, Breger, P, Agostini, P, le Pape, S, Zeitoun, P, Valentin, C, Balcou, P, Ros, D, Kazamias, S, Klisnick, A, Jamelot, G, Rus, B, Wyart, J

Saturated and near-diffraction-limited operation of an XUV laser at 23.6 nm by Carillon, A, Chen, H, Dhez, P, Dwivedi, L, Jacoby, J, Jaegle, P, Jamelot, G, Zhang, J, Key, M, Kidd, A, Klisnick, A, Kodama, R, Krishnan, J, Lewis, C, Neely, D, Norreys, P, O'Neill, D, Pert, G, Ramsden, SA, Raucourt, J, Tallents, G, Uhomoibhi, J