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Optical parametric chirped pulse amplification (OPCPA) is widely used instead of traditional chirped pulse amplification in femtosecond lasers. Recently we reached 0.56 PW based on OPCPA [1], One of the disadvantages of this technique is strong requirements for synchronization of a pump laser (2 ns, Q-switched) and a cw mode-locked laser. In [1] we used synchronization of these two lasers (Nd:YLF and Cnforsterite) described in [2], To overcome a petawatt barrier we are going to include one more stage of OPCPA pumped by a pulse of a few-kJ- Nd:glass amplifiers chain. It takes synchronization with one more Nd:YLF Q-switched master oscillator to seed the Nd:glass amplifiers chain. In this paper we describe synchronization of the cw femtosecond Cnforsterite laser with two Q-switched Nd:YLF master oscillators, see Fig. 1.
© 2007 IEEE
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