【摘要】 在国内首次研制了１０频道、１０２ｋｍ无再生中继使用１个平坦增益光纤放大器的ＷＤＭ光纤传输实验系统。每频道传输码率为１４０Ｍｂ／ｓ（２２３－１ＮＲＺＰＲＢＳ或ＣＭＩＰＲＢＳ）。系统全部采用国产ＤＦＢ激光器，它们的波长分别为１５３１ｎｍ、１５３５ｎｍ、１５３７ｎｍ、１５４５ｎｍ、１５４７ｎｍ、１５４９ｎｍ、１５５１ｎｍ、１５５９ｎｍ、１５６１ｎｍ，在波长为１５５１ｎｍ的频道内布置了２路频率间隔为１ＯＧＨｚ的频分复用（ＦＤＭ）系统。波长分布遍及整个光纤放大器的通带。１０个频道传输１０２ｋｍ后，在误码率为１×１０－９条件下，实测尚有数ｄＢ（最大为１２ｄＢ）的功率裕量。系统使用了具有１８个频道的能力且频道间隔为２ｎｍ的光栅合、分波器，作为波分复用和解复用器。更多还原

【Abstract】 An experimental 10-channel,102km nonregenerated WDM optical fiber Transmission system with a gain-flat EDFA and code pattern being 140Mb/s 223-1 NRZ PRBS or CMI PRBS is built first in China.DFB lasers made in China are used in the system and their wavelengths are about 1531nm,1535nm,1537nm,1545nm,1547nm,1549nm,1551nm,1559nm and 1561nm,which cover all operating passband of the EDFA.Two FDM channels with a frequency spacing of 10 GHz fall into the 1551nm WDM channel.The optical signals are strong enough to have power margin of several dB (Maximum one can be up to 12 dB for the 1535nm) for BER of 10-9 after they are transmitted through 102km.A grating multiplexer and a grating demultiplexer with a channel spacing of 2 nm and a capacity of 18 channels are employed in the system.更多还原