Nowadays, 100G QSFP28 optical modules are popular in the optical communication industry because of their small size, low power consumption, and high density.

​As we know, QSFP28 is considered to be the mainstream form factor in today’s 100GbE optics market. There are many products with QSFP28 form factor including DAC (Direct Attach Copper) cables, AOCs (Active Optical Cables), and transceivers with various interface options, like SR4, LR4, PSM4, CWDM4, etc.

Recent years have seen the evolution towards the Internet of Things (IoT) and the explosion of cloud computing and 5G, raising large pressure on data centers to ramp up both network capacity to 400G and driving cloud service providers and data centers to search for new solutions to achieve their 400G Data Center Interconnects (DCIs).

In order to provide a cost-optimized solution for connecting switches together in a rack or data center, Ethernet switch suppliers want to maximize the density of optical transceiver ports on their equipment. This allows them to offer the maximum number of channels and the lowest cost per bit of traffic.

The 200G QSFP56 optical module and the 200G QSFP-DD optical module are two mainstream solutions for 200G optical interconnects. The QSFP56 utilizes mainstream digital signal processors (DSPs) to help cloud data centers meet the tough challenges of achieving more efficient optical interconnects at a flexible and scalable scale and low cost.