DCM Dispersion Compensation Device
DCM-***
The DCM offer a high dispersion compensation level and a very low insertion loss penalty. They provide negative dispersion compensation over the full C-Band with possible distance extensions of up to 120 kilometers.
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DCM Dispersion Compensation Device
Optical compensation function with slope dispersion compensation for standard single-mode fiber can DCM (G.652) were dispersion and dispersion slope compensation broad band in the C-band, allowing the system to optimize residual dispersion. In the dispersion compensation value of 1545nm wavelength dispersion can reach -2070ps/nm.
The DCM offer a high dispersion compensation level and a very low insertion loss penalty. They provide negative dispersion compensation over the full C-Band with possible distance extensions of up to 120 kilometers.
Dispersion Compensation and Dispersion Slope Compensation
Dispersion Compensation and Dispersion Slope Compensation
Obtained at a specific wavelength dispersion compensation, should satisfy the following relationship:
DTF × LTF + DDCF × LDCF = 0
DTF: transmission fiber dispersion;
LTF: length of the transmission fiber;
DDCF: dispersion of the dispersion compensating optical fiber;
LDCF: dispersion compensation fiber length;
Dispersion slope compensation in the band, should satisfy the following relationship:
STF × LTF + SDCF × LDCF = 0
STF: dispersion of the transmission fiber;
SDCF: dispersion of the dispersion compensating optical fiber
According to the above two relationships obtained dispersion compensation and dispersion slope compensation, should satisfy the following relation:
RDSDCF = SDCF / DDCF = STF / DTF
Assuming standard single mode fiber at 1545nm wavelength dispersion of 16.7ps / nm / km, a dispersion slope of 0.060 ps / nm2 / km, RDS about 0.0036nm﹣1.
Nonlinear Characteristics
Application Example
Ordering Information
Optical compensation function with slope dispersion compensation for standard single-mode fiber can DCM (G.652) were dispersion and dispersion slope compensation broad band in the C-band, allowing the system to optimize residual dispersion. In the dispersion compensation value of 1545nm wavelength dispersion can reach -2070ps/nm.
The DCM offer a high dispersion compensation level and a very low insertion loss penalty. They provide negative dispersion compensation over the full C-Band with possible distance extensions of up to 120 kilometers.
- DWDM system dispersion compensation and broadband low residual dispersion
- G.652 fiber C-band 100% slope compensation (standard value)
- Low insertion loss
- Low polarization mode dispersion
- Performance indicators by Telcordia GR-2854-CORE standard certification
- Reliability by Telcordia GR-1221-CORE standard certification
Dispersion Compensation and Dispersion Slope Compensation
Dispersion Compensation and Dispersion Slope Compensation
Obtained at a specific wavelength dispersion compensation, should satisfy the following relationship:
DTF × LTF + DDCF × LDCF = 0
DTF: transmission fiber dispersion;
LTF: length of the transmission fiber;
DDCF: dispersion of the dispersion compensating optical fiber;
LDCF: dispersion compensation fiber length;
Dispersion slope compensation in the band, should satisfy the following relationship:
STF × LTF + SDCF × LDCF = 0
STF: dispersion of the transmission fiber;
SDCF: dispersion of the dispersion compensating optical fiber
According to the above two relationships obtained dispersion compensation and dispersion slope compensation, should satisfy the following relation:
RDSDCF = SDCF / DDCF = STF / DTF
Assuming standard single mode fiber at 1545nm wavelength dispersion of 16.7ps / nm / km, a dispersion slope of 0.060 ps / nm2 / km, RDS about 0.0036nm﹣1.
Nonlinear Characteristics
| Parameter | Min. | Max. |
| BrillouinScatteringThreshold (dBm) | 6 | - |
| Non-linearCoefficient (n2/Aeff) (W-1) | - | 1.4*10-9 |
| EffectiveArea (Aeff)@1550nm (um2) | 20 | - |
| MaximumInputPower (dBm) | 23 | |
| OperatingTemperatureRange | -5℃ | 70℃ |
| StorageTemperatureRange | -40℃ | 85℃ |
| RelativeHumidity | <85% | |
| Environmental / ReliabilityTesting | Comply with Telcordia GR-2854 and GR-1221 standard | |
| Size(mm) | 482.6(W)x350(D)x43.6(H) | |
Application Example
Ordering Information
| Parameter | DCM-20 | DCM-40 | DCM-60 | DCM-80 | DCM-100 | DCM-120 |
| Compensated Distance (km) | 20 | 40 | 60 | 80 | 100 | 120 |
| 1545nmDispersion (ps/nm) | -340+/-10 | -670+/-20 | -1000+/-30 | -1340+/-40 | -1680+/-50 | -2010+/-60 |
| 1545nmRelativeDispersionSlope (nm-1) | 0.0036 +/- 10% | |||||
| Insertion Loss (dB) | ≤3.3 | ≤4.7 | ≤6.4 | ≤8.0 | ≤9.5 | ≤11.0 |
| Insertion Loss (typ) (dB) | 2.7 | 4.0 | 5.4 | 6.7 | 8.0 | 9.3 |
| PolarizationModeDispersion(ps) | ≤0.6 | ≤0.7 | ≤0.8 | ≤0.9 | ≤1.0 | ≤1.1 |
| PolarizationModeDispersion (typ) (ps) | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 |
| PolarizationDependentLoss (dB) | ≤0.1 | ≤0.1 | ≤0.1 | ≤0.1 | ≤0.1 | ≤0.1 |