论文标题
使用有机晶体BNA的宽带THZ-TD，平均功率为540 kHz的平均功率
Broadband THz-TDS with 5.6 mW average power at 540 kHz using organic crystal BNA
论文作者
论文摘要
我们证明了有机晶体BNA（N-苯甲酰-2-甲基-4-硝基苯胺）的有效光学整流，该苯胺由时间压缩的，可商业的工业YB激光系统以540 kHz的重复速率运行。我们的THZ源达到5.6 MW的THZ平均功率，由4.7 W，45 FS脉冲驱动，所得的THZ-TDS组合了非常宽的带宽7.5 THz，高动态范围为75 dB（测量时间为70 s）。最大THZ功率的转化效率为0.12％。据我们所知，这是迄今为止用BNA证明的最高THZ功率，以高度重复速率实现，并能够证明带宽和动态范围的独特组合，用于THZ-SpectRoscroscopy应用。
We demonstrate efficient optical rectification in the organic crystal BNA (N-benzyl-2-methyl-4-nitroaniline), driven by a temporally compressed, commercially available industrial Yb-laser system operating at 540 kHz repetition rate. Our THz source reaches 5.6 mW of THz average power driven by 4.7 W, 45 fs pulses and the resulting THz-TDS combines a very broad bandwidth of 7.5 THz and a high dynamic range of 75 dB (in a measurement time of 70 s). The conversion efficiency at maximum THz power is 0.12%. To the best of our knowledge, this is the highest THz power so far demonstrated with BNA, achieved at a high repetition rate, and enabling to demonstrate a unique combination of bandwidth and dynamic range for THz-spectroscopy applications.
