Author Affiliations

D. R. Dykaar,^a,b R. Sobolewski,^a,c T. Y. Hsiang,^a G.A. Mourou,^b M. A. Hollis,^d B. J. Clifton,^d K. B. Nichols,^d C. O. Bozler,^d and R. A. Murphy^d

^aDepartment of Electrical Engineering, University of Rochester, Rochester, NY 14627, 716-275 4054

^bLaboratory For Laser Energetics, 250 East River Road, Rochester, NY 14623-1299, 716-275 5101

^cPermanent address : Institute of Physics, Polish Academy of Sciences Pl-02668, Warszawa, Poland

^dLincoln Laboratory, Massachusetts Institute of Technology, Lexington, MA 02173