With the increasing demand for data transmission rate in the optical communication market, higher speed optical modules have also emerged. Compared with 10G and 40G wavelength division transmission systems, 100G optical transmission has achieved a series of significant reforms such as polarization multiplexing phase modulation technology, digital coherent reception technology, third-generation ultra strong error correction coding technology, etc., meeting the needs of users to keep up with the times. In this issue, ETU-LINK will provide a detailed introduction to the 100G SR4 optical module.

What is 100G SR4? Simply put, the transmission rate is 100G, which is composed of four 24G channels. At present, the main types of 100G optical modules launched in the market include QSFP28 optical modules, CFP optical modules, CFP2 optical modules, and CFP4 optical modules. And 100G QSFP28 optical modules are also divided into SR4, ER4, PSM4, 4DWDM and other types.

Taking the 100G QSFP28 SR4 optical module as an example, analyze its characteristics, working principle, and application. The 100G QSFP28 SR4 has a 4-channel full duplex transceiver module, with a data transmission rate of up to 27.952 Gbps per channel and a low power consumption of less than 2.5W. It is packaged in QSFP hot swappable mode and has an 8/12 core MTP/MPO interface. By pairing with multimode fiber, the maximum transmission distance can reach 100M, with built-in digital diagnostic function (DDM).

The 100G QSFP28 SR4 optical module mainly consists of five parts: the first clock recovery module, array driver module, excitation and emission module, photoelectric conversion module, and electrical signal processing module, without the need for an optical multiplexer. Its working principle: When transmitting signals at the transmitting end, the electrical signals are converted into optical signals through 4 array lasers, and then transmitted in parallel on a strip multimode fiber. When reaching the receiving end, the 4 array photodiodes convert the parallel optical signals into parallel electrical signals.

The 100G QSFP28 SR4 optical module is mainly used in 100G data center switches, 100G high-end park core switches, and 5G forward networks, playing an intuitive and important role in building 100G network systems. At present, the ETU-LINK 100G QSFP28 SR4 optical module is widely compatible with switches from various brands such as Huawei, Ruijie, H3C, Cisco, Zhanbo, ZTE, etc.

The above is the introduction of 100G SR4 optical module by ETU-LINK. For more knowledge of optical modules, welcome to visit our website!