The 100G QSFP28 optical module has the characteristics of high density and low power consumption. It not only meets the current network needs, but also prepares for future network expansion. It is an ideal optical module solution for large data centers. Its standards are mainly defined by two major organizations, IEEE and MSA. Among them, IEEE defines the standards of SR4, LR4, ER4, and ZR4. This article of ETU-LINK talks about 100G QSFP28 ER4 optical module.

The 100G QSFP28 ER4 optical module complies with QSFP MSA, IEEE 802.3ba, 100GBASE-ER4 Lite and OTU4 standards. "ER" means ultra-long distance (extend reach). SOA amplification is used before the optical signal passes through the APD photodetector. It can be passed through single-mode Optical fiber enables ultra-long distance transmission of 40km. Adopting WDM multiplexing wavelength division technology, the wavelength is 1295.56-1309.14, using LC duplex connector with DDM, supporting 100G Ethernet and OTU4, and the power consumption is less than 3.8W under the operating temperature condition of 0-70℃, which complies with the data center green energy saving requirements.

However, since the BER requirement of 100G QSFP28 ER4 is better than that of 1E-12 without FEC front-end error correction optical module, the existing APD technology cannot meet its receiving sensitivity, and the SOA volume is too large for the QSFP28 package. Therefore, , many optical module manufacturers in the industry have defined non-standard 100G base ER4 Lite optical modules in QSFP28 packaging. The maximum transmission distance can reach 30km without using FEC.

Working principle:

The 100G QSFP28 ER4 optical module transmitter can work on the four LAN WDM bands of 1295nm, 1300nm, 1305nm and 1310nm. The optical signals on these four bands are multiplexed by the WDM wavelength division multiplexer and then transmitted on the single-mode optical fiber through the industry standard LC connector. At the receiving end, the SOA amplifies the signal before the WDM wavelength division multiplexer splits the signal into individual channels.

Connection solution:

To achieve 100G long-distance transmission of 40km in enterprises or data centers, whether it is direct connection or interconnection, QSFP28 ER4 optical module is the best choice.

1. Direct connection solution:

QSFP28 ER4 supports 100G direct connection, with a maximum transmission distance of up to 40km. Just insert two 100G QSFP28 ER4 modules into the 100G switch port and connect them with an LC duplex single-mode jumper, which provides an economical and applicable solution for long-distance applications of 100GE ports between computer rooms.

2. Data center interconnection solution:

The 100G QSFP28 ER4 optical module is also suitable for connecting data centers located in different geographical locations and supports remote high-speed interconnection between 100G data centers. It is a convenient and economical interconnection solution.

Currently, in the 100G ER4 market, applications are evolving toward miniaturization and low power consumption. The optical modules produced by ETU-LINK are all quality guaranteed and enjoy a 3-year long effective warranty. Please feel free to choose them. We are a professional optical module manufacturer. The above is the entire content of this issue of 100G QSFP28 ER4 optical module. If you want to know more, you can read the previous blogs.