Department of Physics and Center for Applied Photonics, University of Konstanz, Konstanz, Germany.
Opt Lett. 2011 Nov 15;36(22):4458-60. doi: 10.1364/OL.36.004458.
A phase-locked terahertz transient is exploited as an ultrafast phase gate for femtosecond optical pulses. We directly map out the group delay dispersion of a low-power near-infrared pulse by measuring the electro-optically induced polarization rotation as a function of wavelength. Our experiment covers the spectral window from 1.0 to 1.4 μm and reaches a temporal precision better than 1 fs. A quantitative analysis of the detector response confirms that this streaking technique requires no reconstruction algorithm and is also well suited for the characterization of pulses spanning more than one optical octave.
我们利用锁相太赫兹瞬态作为超快相位门来控制飞秒光脉冲。我们通过测量电光诱导的极化旋转随波长的函数，直接绘制出低功率近红外脉冲的群延迟色散。我们的实验涵盖了 1.0 到 1.4μm 的光谱窗口，达到了优于 1fs 的时间精度。对探测器响应的定量分析证实，这种条纹技术不需要重建算法，也非常适合于描述跨越一个以上光倍频程的脉冲。
