by Hirst, G.J., Divan, E.J., Edwards, C.B., Hooker, C.J., Key, M.H., Kidd, A.K., Knott, J.M., Lister, J.M.D., Neely, D., Norreys, P.A., Ross, I.N., Shaw, M.J., Wyborn, B.E.
Published in CLEO '97., Summaries of Papers Presented at the Conference on Lasers and Electro-Optics (1997)