coherent length造句

• With double - frequency technique and q switch technique the laser delivers a laser pulse of 532 - nm in wavelength , 5 - ns in pulse width , 35 - mj in energy and 2 - cm in coherent length
  所用激光器为nd : yag脉冲激光器，采用了调q和二倍频技术，波长为0 . 532 、脉冲宽度为7ns 、相干长度为2cm ，能量为35mj 。
• On the following , on the basis of formulas given above , three kinds of effects due to ionosphere are presented : image shift due to group delay which was caused by the difference between the group velocity and the velocity of light in the ionosphere ; image distortion due to ionospheric dispersion which can create second phase error of lfm signals ; the last , the phase perturbation caused by the irregularities of the ionosphere can reduce the coherent length and affect azimuthal resolution
  文中主要研究了电离层的三种影响：信号经过电离层传播的群延迟引起的成像偏移；电离层的色散效应给线性调频信号带来二次相位误差，导致图像退化、失真；以及电离层的闪烁、湍流等不规则性引起的信号相位起伏。在此基础上，比较分析了不同波段、带宽条件下电离层的影响。