摘要A multiple-pump-pulses-stimulated Raman backscattering amplification (m-SRA) scheme is proposed and examined using 1D PIC simulations. Compared with the SRA using a single long pump pulse, higher energy conversion efficiency can be obtained with the same output laser intensity by employing the m-SRA scheme. Unwanted Raman forward scattering can be suppressed in the m-SRA case. Favorable pulse envelope and frequency characteristics of the seed pulse after amplification are obtained by using the m-SRA scheme.
Abstract：A multiple-pump-pulses-stimulated Raman backscattering amplification (m-SRA) scheme is proposed and examined using 1D PIC simulations. Compared with the SRA using a single long pump pulse, higher energy conversion efficiency can be obtained with the same output laser intensity by employing the m-SRA scheme. Unwanted Raman forward scattering can be suppressed in the m-SRA case. Favorable pulse envelope and frequency characteristics of the seed pulse after amplification are obtained by using the m-SRA scheme.
[1] Malkin V M, Shvets G and Fisch N J 1999 Phys. Rev. Lett. 82 4448
[2] Cheng W, Avitzour Y, Ping Y and Suckewer S 2005 Phys. Rev. Lett. 94 045003
[3] Trines R M G M, Fiúza F, Bingham R, Fonseca R A, Silva L O, Cairns R A and Norreys P A 2011 Nature Phys. 7 87
[4] Luan S X, Zhang Q J, Wu H C and Sheng Z M 2008 Acta Phys. Sin. 57 3646
[5] Sakharov A S and Kirsanov V I 1994 Phys. Rev. E 49 3274
[6] Malkin V M and Fisch N J 2001 Phys. Plasmas 8 4698
[7] Yau T W, Hsu C J, Chu H H, Chen Y H, Lee C H, Wang J and Chen S Y 2002 Phys. Plasmas 9 391
[8] Malkin V M, Tsidulko Yu A and Fisch N J 2000 Phys. Rev. Lett. 85 4068
2012, Vol. 29 
