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Coarse wavelength division multiplexing, the selected 20nm wavelength interval, abbreviated as CWDM, is mainly used in 2km data centers. We also know that the application of 100G optical modules in data centers is comparable to telecommunications applications, so the CWDM industry chain is very Mature, its wavelength selection has become a mainstream solution.
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 | ABS box: 100X80X10mm or customized | |||
Low insertion loss
High channel isolation
Can reach industrial grade
CATV Networks
LAN Networks
WDM System
CWDM wavelengths range from 1260-1625nm, channel spacing is 20nm, which actually cover all the range of DWDM wavelengths (1470-1625nm). And DWDM wavelengths have much smaller channel spaces (0.4nm/0.8nm). Therefore, the CWDM wavelengths near
DWDM wavelengths can be used to transmit the DWDM wavelengths. In most practical applications, CWDM 1530nm channel is used to achieve hybrid CWDM & DWDM.
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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 | ABS box: 100X80X10mm or customized | |||
