We have developed a hybrid Ti:sapphire–Nd:glass laser system that produces more than 1500 TW (1.5 PW) of peak power. The system produces 660 J of power in a compressed 440±20 fs pulse by use of 94-cm master diffraction gratings. Focusing to an irradiance of >7×10<sup>20</sup> W/cm <sup>2</sup> is achieved by use of a Cassegrainian focusing system employing a plasma mirror.
© 1999 Optical Society of America
M. D. Perry, D. Pennington, B. C. Stuart, G. Tietbohl, J. A. Britten, C. Brown, S. Herman, B. Golick, M. Kartz, J. Miller, H. T. Powell, M. Vergino, and V. Yanovsky, "Petawatt laser pulses," Opt. Lett. 24, 160-162 (1999)