LULI, Ecole Polytechnique - CNRS - CEA, Université Paris 6, 91128 Palaiseau, France.
Phys Rev Lett. 2010 Jan 15;104(2):025001. doi: 10.1103/PhysRevLett.104.025001. Epub 2010 Jan 11.
The energy transfer from a long (3.5 ps) pump pulse to a short (400 fs) seed pulse due to stimulated Brillouin backscattering in the strong-coupling regime is investigated. The two pulses, both at the same wavelength of 1.057 microm are quasicounterpropagating in a preformed underdense plasma. Relative amplification factors for the seed pulse of up to 32 are obtained. The maximum obtained amplified energy is 60 mJ. Simulations are in agreement with the experimental results and suggest paths for further improvement of the amplification scheme.
由于强耦合区中的受激布里渊后向散射，从长（3.5 ps）泵浦脉冲到短（400 fs）种子脉冲的能量转移得到了研究。这两个脉冲，波长均为 1.057 微米，在预形成的欠密度等离子体中准反向传播。获得了高达 32 的种子脉冲相对放大因子。获得的最大放大能量为 60 mJ。模拟结果与实验结果一致，并为进一步改进放大方案提供了途径。
