论文标题
在整个可见到近红外光谱范围内测量10 fs脉冲
Measurement of 10 fs pulses across the entire Visible to Near-Infrared Spectral Range
论文作者
论文摘要
可调超快激光脉冲是一种强大的工具，用于衡量材料科学中难以获得的自由度。通常，这些实验需要能够解决材料带隙以上和之下的共振和激发的能力，并在最快的非平凡内部动力学的时间范围内探测它们的响应。这驱动了对能够在整个可见的（VIS）和接近红外（NIR）范围（500 nm -3000 nm）以及这些来源表征的超快量脉冲以及这些源的表征上的超快来源。在这里，我们提出了一个能够在整个Vis-NIR光谱范围内具有10 fs持续时间的脉冲表征的单个频率分辨光门控（FROG）系统。我们的系统不需要辅助梁，而只需要针对不同波长的少量重新配置。我们通过测量整个调谐范围的脉冲测量来演示系统。
Tuneable ultrafast laser pulses are a powerful tool for measuring difficult-to-access degrees of freedom in materials science. In general these experiments require the ability to address resonances and excitations both above and below the bandgap of materials, and to probe their response at the timescale of the fastest non-trivial internal dynamics. This drives the need for ultrafast sources capable of delivering 10-15 fs duration pulses tuneable across the entire visible (VIS) and near infrared (NIR) range, 500 nm - 3000 nm, as well as the characterization of these sources. Here we present a single frequency-resolved optical gating (FROG) system capable of self-referenced characterization of pulses with 10 fs duration across the entire VIS-NIR spectral range. Our system does not require auxiliary beams and only minor reconfiguration for different wavelengths. We demonstrate the system with measurements of pulses across the entire tuning range.
