Optimized design of a system of generating terawatt laser pulses by use ofoptical parametric chirped pulse amplification

Using the numerical method, an optimized design is presented for the genera tion of peak powers up to similar to 60 TW with pulse duration similar to 2 5 fs using an optical parametric chirped pulse amplifier (OPCPA) pumped by the high-power Nd: glass laser. The OPCPA system consists of an LBO preampl ifier and an LBO power amplifier. The numerical simulation results demonstr ate that this system can scale the pulse energy at nanojoule level to the j oule level and generate terawatt pulses. So it provides great potential to efficiently produce and amplify very short femtosecond laser pulses, and ca n be regarded as a step toward generating petawatt laser pulses using optic al parametric chirped pulse amplifiers pumped by powerful nanosecond system s.