论文标题
宽带THZ辐射的基于气质量的生成640兆瓦的平均功率
Gas-plasma based generation of broadband THz radiation with 640 mW average power
论文作者
论文摘要
我们提出了覆盖整个THZ光谱区域的宽带Terahertz辐射的高功率来源（0.1-30 THz）。两种颜色的气体等离子体生成过程是由基于16个杆型放大器的相干组合的最先进的纤维纤维搅拌脉冲放大系统驱动的。在THZ生成之前，脉冲在多通电池中频谱拓宽，并以1.3 MJ的脉冲能量为37 Fs，重复速率为500 kHz。 THZ生成已经采用了气体喷射计划，将过程的效率提高到0.1％。实施空气偏置的检测方案，以表征生成的辐射的完整带宽。 THZ平均功率为640 MW，这是迄今为止达到的最高THZ平均功率。这使得此源适合各种应用程序，例如强烈吸收样品或驱动非线性效应的材料特性研究的光谱。
We present a high-power source of broadband terahertz radiation covering the whole THz spectral region (0.1-30 THz). The two-color gas plasma generation process is driven by a state-of-the-art Ytterbium fiber chirped pulse amplification system based on coherent combination of 16 rod-type amplifiers. Prior to the THz generation, the pulses are spectrally broadened in a multi-pass-cell and compressed to 37 fs with a pulse-energy of 1.3 mJ at a repetition rate of 500 kHz. A gas-jet scheme has been employed for the THz generation, increasing the efficiency of the process to 0.1%. The air-biased-coherent-detection scheme is implemented to characterize the full bandwidth of the generated radiation. A THz average power of 640 mW is generated, which is the highest THz average power achieved to date. This makes this source suitable for a variety of applications, e.g. spectroscopy of strongly absorbing samples or driving nonlinear effects for the studies of material properties.
