Currently, 100G optical modules are becoming more widely used in enterprise data centers. With the introduction of 400G optical module continues to mature and 100G optical module industry chain-scale deployment of 100G optical module cost is also a lot lower than in previous years. Compare 100GQSFP28 optical module and optical module 100G CFP4.
A, 100G package type optical module
100G optical module has a variety of package types, common are: CXP, CFP, CFP2, CFP4 and QSFP28. And wherein QSFP28 CFP4 is two package types. The reason why they different names, because of their package size, different transmission channels and associated protocols.
100G QSFP28 optical modules available since 2013, in order to adapt to different transmission distance and different application scenarios, QSFP28 family in five years has grown in strength and now 100G QSFP28 optical module has LR4, SR4, PSM4, CWDM4 other types.
100G CFP4 optical module can be seen from the name, he is from CFP, CFP2 evolved (as shown below).
Evolution of the optical module 100G CFP4
Two, QSFP28 optical module VS CFP4 optical module
QSFP28 optical module has a plurality of types, the difference between them as shown in FIG.
Four types of the optical module QSFP28
The main difference in the following areas:
1. Volume
Large volume 100G CFP optical module, although it has grown to CFP4, but its volume is still larger than QSFP28 light module. The small size is the QSFP28 can become an important factor optical modules mainstream package 100G. Because of the higher representative of a smaller volume port density, so that on the same switch, QSFP28 using the number of the optical module will be more than CFP8 optical module.
2. Flexibility
100G QSFP28 module applicable to a variety of light transmission distance and a variety of application scenarios, more selective. Less CFP4 optical module type, low flexibility.
3. cooling
100G QSFP28 due to small size of the optical module, the optical focus device, the heat dissipation condition is not good, CFP4 optical module slightly larger, good heat dissipation.
As it can be seen from the above comparison, although 100GCFP4 optical module has some advantages, but still can not fully meet the requirements for high-rate data center optical module. 100G QSFP28 optical module more suitable for high-speed data rate, small volume, low-cost requirements. Feimairuike (Femrice) of the optical module further QSFP28 has broad compatibility and cost advantages.
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