TDCM 是北亿纤通推出的具有可调功能的色散补偿模块，是针对现有大容量传输系统进行色散微调的一种色散补偿模块；G.652 标准光纤在 1550nm 附近波长的色散是正的（17－20）ps/（nm·km），G.655 标准光纤在 1550nm 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
功能示意图
产品规格
表 1 产品规格
|
参数 |
规范 |
|
||||||
|
最小值 |
典型值 |
最大值 |
单位 |
|||||
|
波长范围 |
1528 |
|
1568 |
nm |
||||
|
操作带宽 |
ITU±18 |
|
|
GHz |
||||
|
通道间隔 |
100 |
GHz |
||||||
|
波长偏移能力 |
50GHz (starting wavelength:196.0THz) |
|
||||||
|
可调色散范围 [1] |
±800 [1] |
ps/nm |
||||||
|
操作带宽(OBW) 与可调色散范围(DTR) |
DTR: ±400 ps/nm |
ITU±25 |
|
|
GHz |
|||
|
DTR: ±800 ps/nm |
ITU±18 |
|
|
GHz |
||||
|
色散设置分辨率 |
|
|
10 |
ps/nm |
||||
|
色散精度 |
DTR: ±400 ps/nm |
-15 |
|
15 |
|
|||
|
DTR: ±800 ps/nm |
-30 |
|
30 |
|
||||
|
相对色散准确度 |
10ps/nm≤ Step<20ps/nm |
-10 |
|
10 |
ps/nm |
|||
|
Step≥20ps/nm |
-15 |
|
15 |
ps/nm |
||||
|
调整稳定度 |
-5 |
|
5 |
ps/nm |
||||
|
相位抖动（峰峰） |
|
|
0.2 |
rad |
||||
|
组延时抖动 (峰峰、非平滑) |
|
15 |
ps |
|||||
|
插损 |
3 |
|
6 |
dB |
||||
|
操作带宽内插损抖动 |
|
0.5 |
1 |
dB |
||||
|
插损一致性（所有通道） |
|
|
1 |
dB |
||||
|
回损 |
40 |
|
|
dB |
||||
|
调整时间 |
色散调整时间（全范围）[2] |
|
|
25 |
Sec |
|||
|
偏振相关损耗 |
|
0.1 |
0.2 |
dB |
||||
|
偏振模色散 |
|
|
0.7 |
Ps |
||||
|
功耗 |
|
4.5 |
8 |
W |
||||
|
板卡上电时间 |
|
|
180 |
Sec |
||||
1.色散调整范围±200~±1200
2.色散调整时间测试条件：-800ps/nm调整到800ps/nm
3.色散切换斜率：∆Dispersion / ∆t <= 40ps/nm/100ms
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.
