In recent years, the single-wave 10G transmission mode has been the protagonist of the stage. However, with the popularization of 5G networks, the rise of the Internet of Things, and the application of big data, the data transmission capacity has exponentially increased, and the single-wave 10G transmission The speed will no longer be able to meet the needs of big data; the new corner of the former stage will gradually turn to single-wave 100G, and has begun to be widely used, and in the future, it will develop with 200G, 400G, 800G...

However, at present, all 100G switch interfaces are QSFP28 interfaces as the mainstream. In order to achieve multi-channel 100G long-distance point-to-dual fiber transmission, the DWDM 100G transmission scheme must be applied; and in the traditional 100G DWDM application scheme, The 100G DWDM optical modules are mainly packaged in CFP or CFP2, and the switch interfaces are all QSFP28 interfaces, so to achieve interoperability, the technology of 100G QSFP28 to 100G CFP/CFP2 active equipment is required, as shown in the following figure:

Point-to-point multi-channel 100G DWDM CFP/CFP2 long-distance dual-fiber transmission solution

The traditional CFP/CFP2 coherent optical transmission method, whether it is an active 100G QSFP28 to 100G CFP/CFP2 device or a 100G CFP/CFP2 coherent optical module, has serious technical barriers, resulting in high price and cost. In the past two years, the epidemic has led to the shortage of chips, and the price has risen, which has led to rising tides, prices and costs have gradually increased, and even shortages have occurred.

In order to break this situation, FIBERWDM Ruidong Technology launched 100G DWDM QSFP28 packaged optical modules, which are directly plugged into the 100G switch QSFP28 interface, and then cooperated with dispersion compensation DCM and DWDM fiber amplifier EDFA solution, which can replace traditional 100G CFP/ Transmission scheme of CFP2 coherent light. As shown below:

Point-to-point multi-channel 100G DWDM QSFP28 long-distance dual-fiber transmission solution

Although this solution increases dispersion, it saves the intermediate active 100G QSFP28 to 100G CFP/CFP2 equipment and 100G CFP/CFP2 optical module, which saves considerable price cost in the overall cost (about 100G per channel can be The cost of at least 50,000-70,000 yuan is saved, and the cost of 800,000 to 1 million can be saved by taking 16 channels of 100G as an example).