100G QSFP28 LR4 vs 100G CFP LR4, What’s the difference?

Now 100G Ethernet technology is quite mature, and 100G networks of major enterprises, institutions, or governments are already being deployed. In the development of 100G Ethernet technology, 100G QSFP28 optical modules are widely used in application scenarios, and the optical modules marked as LR4 are the most common. When it comes to 100G optical modules, you may first think of the earliest CFP optical modules, but with the development of the network, CFP optical modules have gradually been unable to meet the requirements of high density and low power consumption in data centers. Under this development trend, 100G QSFP28 optical modules Modules came into being. 100G QSFP28 LR4 optical module is one of the models of QSFP28 optical module. It is widely used in 100G Ethernet. It uses WDM technology to multiplex the optical signals of different wavelengths of 4 Fibre Channels onto one optical fiber. Transmission, to meet the needs of long-distance transmission in the data center. So what is the difference between it and CFP LR4 optical module? How is the 100G QSFP28 LR4 optical module used? The following will give you a detailed answer.

The differences between 100G QSFP28 LR4 optical module and CFP LR4 optical module

100G QSFP28 LR4 optical module and CFP LR4 optical module are both 100G single-mode optical modules with a wavelength of 1310nm and a maximum transmission distance of 10km. They all have the same LC duplex interface, single-mode fiber type, and 10km transmission distance; However, due to their different packaging forms, the qsfp28 LR4 optical module is about 30% smaller in volume than the cfp4 optical module. Compared with the CFP / cfp2 / cfp4-lr4 optical module, the qsfp28-lr4 optical module is not only smaller in volume than the cfp-lr4 optical module, but also does not need to install an expensive transmission. At the same time, the qsfp28-lr4 optical module is 45 times the cfp2-lr4 optical module in its port density. so what is the difference between them?

1. Different Size

The volume of 100G QSFP28 LR4 optical module is smaller than that of CFP LR4 optical module.

2. Different Power Consumption

The power consumption of 100G QSFP28 LR4 optical module is lower than that of CFP LR4 optical module. The power consumption of CFP LR4 optical module is generally between 6 and 24W, while the power consumption of 100G QSFP28 LR4 optical module is generally less than 3.5W.

3. Different Applications

The CFP LR4 optical module supports dual rates and can be applied to 40G and 100G Ethernet, while the 100G QSFP28 LR4 optical module can only be applied to 100G Ethernet. Since the volume of the 100G QSFP28 LR4 optical module is smaller than that of the CFP optical module, the data 100G QSFP28 LR4 optical modules are generally used in high-density wiring environments such as centers.

4. Different Prices

Under the same transmission distance, the cost of CFP LR4 optical module is slightly higher than that of 100G QSFP28 LR4 optical module.

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