polarization n. 1.兩極分化。 2.【物、天】極化;極化強(qiáng)度。 3.【物理學(xué)】偏振(化)。 a polarization cell 極化電池。 atomic polarization 原子極化強(qiáng)度。 orientation polarization 定向極化。 a polarization microscope 偏振顯微鏡。
dispersion n. 1.分散,散開;散布,傳播;離散。 2.【物理學(xué)】彌散,色散;【化學(xué)】分散作用;被分散物;分散相,分散體系;【醫(yī)學(xué)】(炎癥等的)消散;【統(tǒng)計學(xué)】離中趨勢。 3.〔the D-〕 (猶太人的)離散異邦。 the dispersion of heat 熱的擴(kuò)散。 the dispersion of an assembly 集會的解散。 dispersion on the ground 炮彈在地面上的散布。
Polarization mode dispersion (PMD) is a form of modal dispersion where two different polarizations of light in a waveguide, which normally travel at the same speed, travel at different speeds due to random imperfections and asymmetries, causing random spreading of optical pulses. Unless it is compensated, which is difficult, this ultimately limits the rate at which data can be transmitted over a fiber.