Status And Applied Research Of WDM Technology

At present,Optical fiber communications oneself becomes the modern communications network the basic building block,Load bearing correspondence backbone network main transmission duty。Along with corresponds the new service development,Information content and so on pronunciation, image, data become the detonation type growth,Is extremely urgent to the communications network band width request。The existing communications network already with difficulty satisfied requests , The expansion message capacity becomes the urgent matter。The wave minute multiplying technology basic principle is simultaneously transmits many different light wave length channel technology in a core optical fiber,May cause the different wave length using this technology channel Cheng Bei, ten time of, hundred time of place growth。Usually expresses any two channel wave length gap by GHz or the nm these two kind of measuring unit,For example 200GHz or 1.6nm, 100GHz or 0.8nm and so on。When the wave length gap is smaller than is equal to 1 OOGHz or 0.8nm,WDM is called the Dense Wavelength Division Multiplexing (DWDM) technology,Uses the WDM technology to be possible in the original transmission speed foundation,Becomes time of place to expand the optical fiber through-put capacity,Carries on the capacity to the correspondence network the expansion。The WDM technology may in not need to lay the new optical cable underthe condition,Increases the single core optical fiber greatly the transmission capacity,Thus saves the investment greatly,Has the huge economic efficiency。The WDM communications network is an agreement is transparent, theform transparent network,May the...