Opt Lett. 2013 Dec 1;38(23):5040-2. doi: 10.1364/OL.38.005040.
Direct compression of femtosecond optical pulses from a Ti:sapphire laser oscillator was realized with a cholesteric liquid crystal acting as a nonlinear 1D periodic Bragg grating. With a 6 μm thick sample, the pulse duration could be compressed from 100 to 48 fs. Coupled-mode equations for forward and backward waves were employed to simulate the dynamics therein, and good agreement between theory and experiment was obtained.
飞秒光脉冲经钛宝石激光振荡器直接压缩，利用胆甾相液晶作为非线性一维周期布拉格光栅实现。在 6μm 厚的样品中，脉冲持续时间从 100fs 压缩至 48fs。采用前向和后向波的耦合模方程对其动力学过程进行模拟，理论与实验结果吻合较好。
