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光纤中的偏振模色散ＰＭＤ（ＰｏｌａｒｉｚａｔｉｏｎＭｏｄｅＤｉｓｐｅｒｓｉｏｎ）是限制高速光纤通信系统传输容量的极限因素，我们首次用波长扫描法在国内实现了对光纤偏振色散的测量；并对国内外多种光纤进行了测量比较，发现国产的光纤质量有待改进．
Polarization mode dispersion PMD (Polarization Mode Dispersion) in optical fiber is the limit factor to limit the transmission capacity of high-speed optical fiber communication system. For the first time, we have realized the measurement of optical fiber polarization dispersion in China by wavelength scanning method. , Found that the quality of domestic fiber needs to be improved.