As we all know, the current data center demand for the 100G data center optical module market is increasing. There are many different models of 100G optical modules. Among them, QSFP28 has great advantages compared with other models due to its small size and low power consumption. In this article, we will introduce the definition, working principle, and specifications, application of the QSFP28 LR4 optical module in detail.
QSFP28 LR4 Optical Transceiver Definition
QSFP28 LR4 is designed as a hot-pluggable, four-channel, and full-duplex optical transceiver module. It is generally used in 100G Ethernet data transmission. The operating bandwidth of QSFP28 LR4 is 1295nm to 1310nm. The use of QSFP28 LR4 can meet the eternal requirements of ultra-large-scale data centers for transmission distance. Compared with other models of 100G optical modules, it provides an ideal solution. Meanwhile, the QSFP 100G LR4 module is fully compliant with the IEEE 802.3ba standard.
Figure 1: QSFP28 100G LR4 Modules
QSFP28 LR4 Work Principle
When transmitting optical signals, the 100G QSFP28 LR4 optical module converts four 25Gbps electrical signals into four LAN WDM optical signals by the multiplexer and then multiplexes them into one channel at the transmit terminal to make a 100G optical transmission. At the receiving terminal, the module demultiplexes 100G optical light demultiplexing into four LAN WDM optical signals and then the demultiplexer converts them into four electrical channel signal output channels.
QSFP28 LR4 Specifications
|Max Data Rate||103.125Gbps (4x 25.78Gbps)|
|Max Cable Distance||10km|
|Transmitter Type||4 x LAN WDM DML (DFB)|
|Protocols||IEEE 802.3ba 100GBASE-LR4, IEEE 802.3bm, QSFP28 MSA, SFF-8665, SFF-8636|
QSFP 100G LR4: Cabling and Connectivity
Many enterprises and data centers will connect 10Gb/s and 40Gb/s networks to 100Gb/s connections, while QSFP 100G LR4 is ideal for long-haul 100G connections including direct and interconnect.
100G to 100G Direct Connection
The method to get a direct 100G connection is the same as for 10G/40G. Just plug two 100G QSFP28 LR4 optical modules into the QSFP28 ports on the switch, what we need to pay attention to is that they are connected with LC optical cables.
At the same time, we know that the transmission rate of CFP and QSFP28 LR4 are both 100G, and both of them work at 1310nm, so we can connect the QSFP 100G LR4 to the CFP 100G LR4 at the other end, under this connection, it is still can work well.
100G-100G Interconnect Cabling Solution with Rack Mount Fiber Enclosure
As the following picture shows, high-density QSFP 100G LR4 interconnect cabling can be achieved by using rack-mount fiber enclosure, MTP fiber adapter panels and MTP trunk cable. In this way, fiber enclosures and adapter panels can establish structured cable management.
Figure 2:QSFP28 LR4 Module 100G-100G Interconnection
After the introduction of this article, I believe you have a good understanding of QSFP28 100G LR4. If you have any questions about how to use QSFP28 100G LR4 optical modules, you can contact QSFPTEK customer service via email@example.com, QSFPTEK is a company specializing in the production of optical products such as optical modules, MUX, optical fiber cable companies, it provides high-quality, cost-effective products.