CWDM(Coarse Wavelength Division Multiplexing) is a standardized WDM technology that uses up to 20 different wavelengths for data transmission over a single fiber.
In contrast to Dense WDM(DWDM), CWDM uses only a "coarse" wavelength grid, so the underlying optical component technology is simpler. This makes CWDM systems very cost-effective, but also limits them in terms of total capacity.
CWDM can solve the shortage of fiber and transparent transmission of business, and reduce the cost of network building. With low-cost low power consumption and small compact, it is widely used in metro aggregation and access layer to do transmission on a short time.
| Parameter | Unit | Value | |||
|---|---|---|---|---|---|
| Channels Number | - | 2 | 4 | 8 | 16 |
| Channel Space | nm | 20 | |||
| Central Wavelength | nm | 1271~1611 | |||
| Operating wavelength | nm | 1260-1460 or 1460-1620 or 1260-1620 | |||
| Passband | nm | λITU±6.5 | |||
| Pass band Flatness | dB | ≤0.5 | |||
| Insertion Loss (Typ.) | dB | 0.8 | 1.3 | 2.4 | 4.6 |
| Insertion Loss (Max.) | dB | 0.9 | 1.5 | 2.8 | 5.0 |
| Adjacent Channel Isolation | dB | ≥30 | |||
| Non-adjacent Channel Isolation | dB | ≥40 | |||
| Polarization Mode Dispersion | ps | ≤0.1 | ≤0.1 | ≤0.15 | ≤0.15 |
| Polarization Dependent Loss | dB | ≤0.1 | ≤0.15 | ≤0.2 | ≤0.25 |
| Return Loss | dB | ≥50 | |||
| Directivity | dB | ≥50 | |||
| Insertion Loss Temperature Sensitivity | dB/°C | 0.005 | 0.005 | 0.007 | 0.007 |
| Wavelength Temperature Shifting | nm/°C | 0.002 | |||
| Operation Temperature | °C | -10~+70 | |||
| Storage Temperature | °C | -40~+85 | |||
| Package Dimension | mm | customized | |||
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