State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China.
Opt Lett. 2012 Jul 1;37(13):2748-50. doi: 10.1364/OL.37.002748.
We experimentally demonstrated that both the electronic Kerr effect and the molecular alignment in gaseous molecules could be applied as transient gates to diagnose 400 nm target pulses. Their birefringence dissimilarity was clearly visualized by the measured spectrogram and retrieved gate function. In the atomic gas argon, a relatively weak and instantaneous cross phase modulation within the pulse duration was observed, while in the molecular gas N(2), the delayed rotational Raman excitation played a dominative role.
我们通过实验证明，气态分子中的电子克尔效应和分子取向都可以作为瞬态门来诊断 400nm 目标脉冲。通过测量的光谱图和恢复的门函数，可以清晰地观察到它们的双折射差异。在氩原子气体中，在脉冲持续时间内观察到相对较弱和瞬时的交叉相位调制，而在 N2 分子气体中，延迟的旋转拉曼激发则起主导作用。
