The generation and characterization of ultrashort laser pulses in the deep ultraviolet spectral region is challenging, especially at high pulse repetition rates and low pulse energies. Here, we combine achromatic second harmonic generation and adaptive pulse compression for the efficient generation of sub-10 fs deep ultraviolet laser pulses at a laser repetition rate of 200 kHz. Furthermore, we simplify the pulse compression scheme and reach pulse durations of ≈10 fs without the use of adaptive optics. We demonstrate straight-forward tuning from 250 to 320 nm, broad pulse spectra of up to 63 nm width, excellent stability and a high robustness against misalignment. These features make the approach appealing for numerous spectroscopy and imaging applications.

中文翻译：

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使用标准光学器件以高重复率生成和压缩 10-fs 深紫外脉冲

深紫外光谱区超短激光脉冲的产生和表征具有挑战性，尤其是在高脉冲重复率和低脉冲能量的情况下。在这里，我们将消色差二次谐波生成和自适应脉冲压缩相结合，以 200 kHz 的激光重复率有效生成低于 10 fs 的深紫外激光脉冲。此外，我们简化了脉冲压缩方案并在不使用自适应光学器件的情况下达到 ≈10 fs 的脉冲持续时间。我们展示了从 250 到 320 nm 的直接调谐、高达 63 nm 宽度的宽脉冲光谱、出色的稳定性和对错位的高鲁棒性。这些特性使该方法对众多光谱和成像应用具有吸引力。