论文标题
单周期，MHz重复率THz源，平均功率为66兆瓦
Single-cycle, MHz-repetition rate THz source with 66 mW of average power
论文作者
论文摘要
我们在尼橙酸锂中使用倾斜的脉冲前方法证明了THZ的产生，该方法以前所未有的高平均功率超过100 W，并以13.3 MHz的重复速率驱动，由无紧凑的放大器模型的薄膜振荡器提供。转化效率针对泵的斑点尺寸和泵脉冲持续时间进行了优化，从而使我们能够产生最大THZ平均功率为66 MW，这是从激光驱动的，几乎没有循环的THZ源的迄今为止报告的最高功率。此外，我们将光束散步视为当前限制这种激发效率的主要障碍（具有中等脉搏能和小点尺寸）。进一步的升级到瓦特级别及以后的范围还可以，为线性和非线性高平均功率THZ光谱实验铺平了道路，并以MHz重复率以特殊的信噪比为特征。
We demonstrate THz generation using the tilted pulse front method in Lithium Niobate, driven at unprecedented high average power of more than 100 W and at 13.3 MHz repetition rate, provided by a compact amplifier-free modelocked thin-disk oscillator. The conversion efficiency was optimized with respect to pump spot size and pump pulse duration, enabling us to generate a maximum THz average power of 66 mW, which is the highest reported to date from a laser-driven, few-cycle THz source. Furthermore, we identify beam walk-off as the main obstacle that currently limits the conversion efficiency in this excitation regime (with moderate pulse energies and small spot sizes). Further upscaling to the watt level and beyond is within reach, paving the way for linear and nonlinear high-average power THz spectroscopy experiments with exceptional signal-to-noise ratio at MHz repetition rates.
