论文标题
单发d-scan技术用于超短激光脉冲的表征，使用横向第二谐波生成在随机非线性晶体中
Single-shot d-scan technique for ultrashort laser pulse characterization using transverse second-harmonic generation in random nonlinear crystals
论文作者
论文摘要
我们展示了一种新型的分散扫描（D-scan）方案，用于超短激光脉冲的单发时间表征。这种方法的新颖性依赖于使用具有随机分布和大小的反平行非线性结构域的高度分散晶体的使用。该晶体能够产生横向第二谐波信号，同时充当D-Scan设备的分散元件和非线性介质。由此产生的在线体系结构使该技术非常简单，强大，从而可以实时获取单发d-scan痕迹。此外，可以避免需要进行分散预补偿来进一步简化该技术。检索到的脉冲与独立的青蛙测量非常吻合。我们还将新的单发d-scan应用于配备有可编程脉冲塑形器的TW级激光器，并在应用和D-Scan检索的分散体之间获得了出色的一致性。
We demonstrate a novel dispersion-scan (d-scan) scheme for single-shot temporal characterization of ultrashort laser pulses. The novelty of this method relies on the use of a highly dispersive crystal featuring antiparallel nonlinear domains with a random distribution and size. This crystal, capable of generating a transverse second-harmonic signal, acts simultaneously as the dispersive element and the nonlinear medium of the d-scan device. The resulting in-line architecture makes the technique very simple and robust, allowing the acquisition of single-shot d-scan traces in real time. In addition, the technique can be further simplified by avoiding the need of dispersion pre-compensation. The retrieved pulses are in very good agreement with independent FROG measurements. We also apply the new single-shot d-scan to a TW-class laser equipped with a programmable pulse shaper, obtaining an excellent agreement between the applied and the d-scan retrieved dispersions.
