Temporal contrast control at the PHELIX petawatt laser facility by means of tunable sub-picosecond optical parametric amplification
Temporal contrast control at the PHELIX petawatt laser facility by means of tunable sub-picosecond optical parametric amplification
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DOI：
10.1007/s00340-013-5714-9
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发表时间：
2014-08-01
影响因子：
2.1
通讯作者：
Bagnoud, V.
中科院分区：
文献类型：
--
作者：
Wagner, F.;Joao, C. P.;Bagnoud, V.
我们报告的时间对比度增强和控制在拍瓦级激光器的一个模块的发展。该模块是基于超快光参量放大器（uOPA），它产生时间上干净的脉冲在60 μ J的水平播种啁啾脉冲放大（CPA）系统，即petawatt设施PHELIX。放大器模块允许降低后续放大器的增益，从而使放大自发辐射（ASE）衰减超过4个数量级。由于CPA系统的ASE线性依赖于播种能量，因此我们能够通过调整uOPA的增益来证明时间对比度的连续变化。
We report on the development of a preamplifier module for temporal contrast enhancement and control at petawatt-class lasers. The module is based on an ultrafast optical parametric amplifier (uOPA), which produces temporally clean pulses at the 60 mu J level for seeding a chirped pulse amplification (CPA) system, namely the petawatt facility PHELIX. The amplifier module allows for gain reduction in the following amplifiers, resulting in an attenuation of amplified spontaneous emission (ASE) by more than 4 orders of magnitude. Since the ASE of a CPA system linearly depends on the seeding energy, we were able to demonstrate a continuous variation of the temporal contrast by tuning the gain of the uOPA.