Hwang Sung In, Cho Wosik, Yun Hyeok, Kim Kyung Taec, Yun Jin Woo, Lee Seong Ku, Sung Jae Hee
Center for Relativistic Laser Science, Institute for Basic Science, Gwangju, 61005, Korea.
Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, Gwangju, 61005, Korea.
Sci Rep. 2024 Oct 18;14(1):24457. doi: 10.1038/s41598-024-75415-z.
We demonstrated an inline synthesizer for generating ultrashort pulses in the ultraviolet (UV) range. The inline UV pulse synthesizer comprised three nonlinear crystals located in the propagation path of the fundamental driving laser pulse. Second-harmonic signals with central wavelengths of 420, 375, and 345 nm were generated in turn in the three BBO crystals, resulting in a synthesized UV pulse subsequent to the final nonlinear crystal. Its temporal amplitude and phase could be manipulated easily by changing the relative positions of the crystals, allowing for flexibility of the waveform. The minimum pulse duration of the synthesized UV pulse was 4.7 fs, which was close to the Fourier-transform-limited pulse duration. This ultrashort UV pulse with 19 J energy can be utilized in various applications such as high harmonic generation and frustrated tunneling ionization.
我们展示了一种用于产生紫外（UV）波段超短脉冲的在线合成器。该在线紫外脉冲合成器由位于基频驱动激光脉冲传播路径中的三个非线性晶体组成。在三个BBO晶体中依次产生中心波长为420、375和345 nm的二次谐波信号，在最后一个非线性晶体之后产生合成紫外脉冲。通过改变晶体的相对位置，可以轻松地操纵其时间幅度和相位，从而实现波形的灵活性。合成紫外脉冲的最小脉冲持续时间为4.7 fs，接近傅里叶变换极限脉冲持续时间。这种能量为19 J的超短紫外脉冲可用于高次谐波产生和受阻隧穿电离等各种应用。
