100G QSFP28 CLR4 and CWDM4 light modules are also 2km. What is the difference?

With the continuous surge in data center traffic, the market demand of the 100G light module is also increasing. The common 100G light modules are SR4, LR4, ER4, etc. However, in actual applications, due to the length and short length of the fiber optic chain, the length and short length of the fiber are short. Several types of optical modules alone cannot meet the most cost -effective data center optical network transmission solutions.

Therefore, in the medium and long distance, the CWDM4 MSA organization and the 100G CLR4 Alliance also formulated a 100G QSFP28 CWDM4 standard with a transmission distance of 2 km and 100G QSFP28 CLR4 standard. So what are the same and different places with the same transmission distance of 100G QSFP28 CLR4 and CWDM4 light modules? The answer will be revealed below.

Same:

1. The types of the two are dual -work LC;

2. Both of them use CWDM wave duplication technology. Both working wavelengths are 1270, 1290, 1310, 1330nm;

3. Both are single -mode light modules, and the transmission distance is 2km.

the difference:

100G QSFP28 CWDM4 light module must be used for optical fiber links with front -oriented errors (FEC) functions.

100G QSFP28 CLR4 optical module can be used for optical fiber links with front -oriented error (FEC) function, and can also be used for fiber links that do not have front -oriented error (FeC) function.

In the optical fiber link that does not have front -oriented error correction (FEC) function, the 100G QSFP28 CLR4 optical module can also maintain low latency and low power consumption performance. The feature of 100G QSFP28 CLR4 light module makes it more popular in high -performance computing, high -frequency transactions and other fields.