Tan Chao, Fu Xiquan, Hu Yonghua, Deng Yangbao, Shi Xiaohui, Zhan Shiping, Xi Zaifang
Opt Express. 2017 Jun 26;25(13):14065-14076. doi: 10.1364/OE.25.014065.
We present a theoretical and experimental study of plasma optical modulation for probe lasers based on the plasma induced by pump pulses. This concept relies on two co-propagating laser pulses in carbon disulfide, where a drive laser pulse first excites plasma channels while a following carrier laser pulse is modulated by the plasma. The modulation on the probe beam can be conveniently adjusted through electron density, plasma width, propagation distance of plasma, the power of pump lasers, or the pump beam's profile. The experimental results and theoretical solutions are very consistent, which fully illustrates that this method for plasma optical modulation is reasonable. This pump-probe method is also a potential measurement technique for inferring the on-axis plasma density shape.
我们展示了基于泵浦脉冲诱导产生的等离子体对探测激光进行等离子体光调制的理论和实验研究。这一概念基于在二硫化碳中共同传播的两个激光脉冲，其中驱动激光脉冲首先激发等离子体通道，而随后的载波激光脉冲则由等离子体进行调制。通过电子密度、等离子体宽度、等离子体传播距离、泵浦激光功率或泵浦光束轮廓，可以方便地调节对探测光束的调制。实验结果与理论解非常吻合，充分说明了这种等离子体光调制方法是合理的。这种泵浦-探测方法也是推断轴上等离子体密度形状的一种潜在测量技术。
