不同脉宽的啁啾脉冲高斯光束载波相位漂移研究

为了研究不同脉宽情况的线性啁啾脉冲高斯光束在传播方向和横截面内的载波相位变化分布,采用数值研究方法,对载波相位在传播过程中的变化进行了研究。由数值研究可知,在传播方向上,不同脉宽的脉冲光束,从负无穷远到正无穷远将经历π相位变化,并在正无穷远处渐尽于-π/2;在传播距离越远的平面,其载波相位变化量越小,且其变化量为0的位置r越小。结果表明,载波位相变化的特点主要由波前和相位曲率半径的关系决定。

Carrier-Envelope Phase Slipping of the Chirped Pulsed Gaussian Beam with Varied Pulse Duration

In order to study the phase shift of the carrier envelope of the linear chirped pulsed Gaussian beam in the propagation direction and the cross section, the phase shift was simulated. The results show the carrier envelope phase φCEP for beam with different pulse width undergoes a -π shift from negative infinity to positive infinity and gradually changes to -π/2.The farther from the original beam waist plane, the smaller the phase shift, and the smaller the radius to the axis.The phase shift of the carrier envelope is dependent on the relation between the phase front and the phase radius.