抑制等信道间距陆上干线光纤通信系统中光纤色散和四波混频效应的新方案  

A New Scheme in Long-haul Optical Terrestrial Systems with Equal-channel-spacing to Depress Fiber Dispersion and FWM Effects

作　　者：宋健[1] 范崇澄[1] 杨知行 

机构地区：[1]清华大学电子工程系

出　　处：《高技术通讯》1996年第7期30-33,共4页Chinese High Technology Letters

基　　金：国家自然科学基金

摘　　要：提出了一种用以克服等信道间距划分、波分复用（ＷＤＭ）＋掺饵光纤放大器（ＥＤＦＡ）陆上光纤通信系统中光纤色散和四波混频（ＦＷＭ）效应的新方案。采用１５５０ｎｍ处色散为－２．８９ｐｓ／ｋｍ／ｎｍ的小色散单模光纤（ｓｍａｌｌ－ｄｉｓｐｅｒｓｉｏｎｓｉｎｇｌｅ－ｍｏｄｅ－ｆｉｂｅｒ，ＳＤＳＭＦ）可避免严重的ＦＷＭ效应，同时利用ＩＴＵ－ＴＧ．６５２非色散位移光纤（ｎｏｎ－ｄｉｓｐｅｒｓｉｏｎ－ｓｈｉｆｔｅｄｆｉｂｅｒ，ＮＤＳＦ），在ＥＤＦＡ整个带宽范围内（１５３０～１５７０ｎｍ）补偿ＳＤＳＭＦ引入的负色散。采用此方案，一个１０路×１０Ｇｂ／ｓ、１０级ＥＤＦＡ级联的等信道间距（１ｎｍ）光纤通信系统，经近千公里的光纤传输后，ＦＷＭ和色散引入的恶化量将分别小于１ｄＢ。A new method for equally-spaced channel WDM + EDFA terrestrial systems to combat with fiber dispersion and FWM effects is proposed. Small-dispersion single-mode-fiber (SDSMF) with-2. 89ps/km/nm dispersion@1. 55μm is introduced to avoid severe FWM, while ITU-T G. 652 nondispersion-shifted fiber (NDSF) is used to compensate for the negative dispersion of this SDSMF within the entire EDFA bandwidth. Using this scheme, the FWM-and dispersion-induced penalty in a 10 × 10Gb/s, 10 stage EDFA equally-spaced (1nm) channel system after ～ 1, 000km fiber transmission could still be less than1dB, respectively.

关 键 词：光纤色散 等信道间距 光纤通信系统 

分 类 号：TN929.11[电子电信—通信与信息系统]