Kida Yuichiro
Opt Lett. 2020 Apr 15;45(8):2231-2234. doi: 10.1364/OL.390135.
A transient-grating cross-correlation frequency-resolved optical gating (TG XFROG) with a thin gas target toward characterization of sub-femtosecond optical pulses is discussed. For evaluation of the reliability, sub-10 fs near-infrared pulses are characterized, the results of which are compared with those given by the sum-frequency-generation XFROG. The TG XFROG covers the nanojoule energy range or that for the advanced few-cycle UV pulses recently reported. It is also shown that the TG XFROG fails to characterize and heavily underestimates the durations of intense test pulses. The FROG technique sensitively detects the onset of this anomalous behavior, which represents a serious issue for pulse characterizations.
讨论了一种用于表征亚飞秒光脉冲的瞬态光栅互相关频率分辨光学门控（TG XFROG），其采用薄气体靶。为评估可靠性，对亚10飞秒近红外脉冲进行了表征，并将结果与和频产生XFROG给出的结果进行比较。TG XFROG涵盖了纳焦能量范围或最近报道的先进少周期紫外脉冲的能量范围。还表明，TG XFROG无法表征并严重低估了强测试脉冲的持续时间。FROG技术能灵敏地检测到这种异常行为的开始，这对脉冲表征来说是一个严重问题。
