The control device creates driving voltage output every time. One driving voltage has duration, called a pulse width.
控制仪每次输出一位的驱动电压，一个驱动电压持续时间，称为脉冲宽度。
2
The shift of reflective wavelength of one FBG under external strain is translated into a change in time interval of the optical pulse from another FBG drived by a PZT plate.
By using one-dimension FDTD method we simulates the decay of double exponential pulse through the soil media, and its refractive time-domain wave shape is discussed in detail.