The spectral dispersion of single-mode fiber is measured and the zero chromatic dispersion wavelength, the slope of dispersion vs. wavelength are obtained.
对单模光纤的色散谱进行测量，得出单模光纤的零色散波长和色度色散随波长变化的斜率。
2
At that time, the slope of stress-strain curve of the rock is zero.
此时岩体应力—应变曲线的斜率为零。
3
An improved method which measures frequency through the slope of zero based on the cross-zero detecting is presented.