100G SR4 Optical Module Introduction and Application

As the optical communication market has higher and higher requirements for data transmission rates, higher-speed optical modules are also born. Compared with 10G and 40G wavelength division transmission systems, 100G optical transmission has realized a series of major reforms such as polarization multiplexing phase modulation technology, digital coherent receiving technology, third-generation super error correction coding technology, etc. demand. This issue will introduce the 100G SR4 optical module in detail.

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

Take 100G QSFP28 SR4 optical module as an example to analyze its characteristics, working principle and application. 100G QSFP28 SR4 has a 4-channel full-duplex transceiver module, each channel up to 27.952 Gbps data transfer rate, low power consumption less than 2.5W, QSFP hot-swappable package, 8/12-core MTP/MPO interface, through matching with multi-mode fiber, the maximum Transmission distance up to 100M, built-in digital diagnosis function (DDM).

The 100G QSFP28 SR4 optical module is mainly composed of five parts: the first clock recovery module, the array drive module, the excitation and emission module, the photoelectric conversion module and the electrical signal processing module, without using an optical multiplexer. Its working principle: When the signal is transmitted at the transmitting end, the electrical signal is converted into an optical signal by the 4-array laser, and then transmitted in parallel on the ribbon multi-mode fiber. When reaching the receiving end, the 4-array photodiode converts the parallel optical signal into a parallel optical signal. electric signal.