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 | 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.
