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DCM: 色散补偿板卡
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DCM 是北亿纤通推出的负色散光纤,是针对现已铺设的 G.652& G.655 标准单模光纤而设计的一种新型单模光纤;G.652 标准光纤在 1550nm 附近波长的色散是正的(17-20)ps/(nm·km),G.652 标准光纤在 1500nm 波长的色散是正的(4-6)ps/(nm·km),并且具有正的色散斜率,因此需要在这些光纤中加接具有负色散的色散补偿光纤,进行色散补偿,以保证整条光纤线路的总色散近似为零,从而实现高速度、大容量、长距离的通信。
色散是光纤的传输特性之一,光脉冲信号在光纤中传输一段距离以后将出现时间上的展宽,产生码间干扰,从而增加误码率,影响通信质量。
数据速率越高,越容易产生码间串扰
传输距离越长,越容易产生码间串扰
表 1 产品规格
产品型号 | FT-27-DCM20 | FT-27-DCM40 | FT-27-DCM60 | FT-27-DCM80 | FT-27-DCM100 |
等效G.652补偿长度 | 20km | 40km | 60km | 80km | 100km |
1545nm波长色散 (ps/nm) | -340±20 | -670±30 | -1000±40 | -1340±50 | -1670±60 |
插入损耗 | ≤3.6 dB | ≤4.8 dB | ≤6.8 dB | ≤8 dB | ≤9 dB |
偏振膜色散 | ≤0.6 ps | ≤0.9 ps | ≤1 ps | ≤1 ps | ≤1 ps |
光接口 | LC/PC | ||||
典型功耗 | 0W (无源器件) | ||||
所占业务槽位 | 1槽位(超过40km时,需要单独配置无源机框 |
Important Notice
Performance figures, data and any illustrative material provided in this data sheet are typical and must be specifically confirmed in writing by F-tone Networks before they become applicable to any particular order or contract. In accordance with the F-tone Networks policy of continuous improvement specifications may change without notice.
The publication of information in this data sheet does not imply freedom from patent or other protective rights of F-tone Networks or others. Further details are available from any F-tone Networks sales representative.