Wu Xiaojun, Calendron Anne-Laure, Ravi Koustuban, Zhou Chun, Hemmer Michael, Reichert Fabian, Zhang Dongfang, Cankaya Huseyin, Zapata Luis E, Matlis Nicholas H, Kärtner Franz X
Opt Express. 2016 Sep 5;24(18):21059-69. doi: 10.1364/OE.24.021059.
We demonstrate the generation of 100 GHz single-cycle pulses with up to 10 MW of peak power using optical rectification and broadband phase matching via the tilted pulse front (TPF) technique in lithium niobate. The optical driver is a cryogenically cooled Yb:YAG amplifier providing tens of mJ energy, ~5 ps long laser pulses. We obtain a high THz pulse energy up to 65 µJ with 31.6 MV/m peak electric field when focused close to its diffraction limit of 2.5 mm diameter. A high optical-to-THz energy conversion efficiency of 0.3% at 85 K is measured in agreement with numerical simulations. This source is of great interest for a broad range of applications, such as nonlinear THz field-matter interaction and charged particle acceleration for ultrafast electron diffraction and table-top X-ray sources.
我们展示了利用铌酸锂中的倾斜脉冲前沿（TPF）技术通过光学整流和宽带相位匹配产生峰值功率高达10兆瓦的100吉赫兹单周期脉冲。光驱动器是一个低温冷却的Yb:YAG放大器，可提供数十毫焦的能量、脉宽约5皮秒的激光脉冲。当聚焦接近其2.5毫米直径的衍射极限时，我们获得了高达65微焦的太赫兹脉冲能量，峰值电场为31.6兆伏/米。在85K下测得的光到太赫兹的能量转换效率高达0.3%，与数值模拟结果一致。该光源对于广泛的应用具有重要意义，例如非线性太赫兹场与物质的相互作用以及用于超快电子衍射和桌面X射线源的带电粒子加速。
