40G QSFP+optical module is dedicated to high-density application systems, with higher port density and lower overall system cost compared to traditional SFP+optical modules. Due to the differences in various parameters, the application range is also different. 40G QSFP+ SR4 optical modules are mostly used in multimode applications to achieve short distance connections of data center equipment. 40G QSFP+ LR4 and 40G QSFP+ ER4 optical modules are usually used to achieve the transmission of optical signals on long-distance single-mode fibers. This blog discusses the 40G QSFP+ ER4 optical module through ETU-LINK.

The scenarios applied by optical modules with different transmission distances are also different. Among several models of 40G optical modules, the 40G QSFP+ ER4 optical module has the farthest transmission distance. The 40G QSFP+ ER4 optical module complies with the QSFP+ MSA and IEEE 802.3ba specifications, adopts CWDM transmission technology, with center wavelengths of 1271nm, 1291nm, 1311nm, 1331nm, duplex LC connectors, and can be used with single mode fiber optics (SMF) to achieve a maximum transmission distance of 40KM. It also supports DDM digital diagnosis and monitoring functions.

Working principle: When transmitting a signal at the transmitting end, the electrical signal is first converted into an optical signal through a laser array. When transmitting the signal at the transmitting end and receiving the signal at the receiving end, the photodetector array converts the parallel optical signal into a parallel electrical signal.

The 40G QSFP+ ER4 optical module converts four input channels of 10G data into four CWDM optical signal channels, each with a rate of up to 11.2Gbps, and multiplexes them into a single channel for 40G optical transmission. Mainly used for 40GBASE-ER4 Ethernet links, Infiniband QDR and DDR interconnections, and client 40G telecommunications connections.

Due to its technological advantages such as long transmission distance, high efficiency, and low management cost, 40G QSFP+ ER4 optical modules have become an essential part of data center network construction. The above is the entire content of this issue about 40G QSFP+ ER4 optical modules. As a professional optical module manufacturer, ETU-LINK is committed to providing high-quality optical module products for everyone. For more information, welcome to visit the ETU-LINK official website for consultation.