1. 5-100m multimode fiber optic cable between switches
When utilized with OM3 multimode fiber, use the 100G QSFP28 SR4optical module, which has an MTP interface (8 cores) and a transmission distance of 70m.
When using OM4 multimode fiber, the transmission distance is 100m. In 100G networks, the 100G QSFP28 SR4optical module is suitable for short distance transmission (less than 100m).
2. Single-mode fiber optic cabling between switches: >100M-2KM
Choose between the 100G QSFP28 PSM4 optical module and the 100G QSFP28 CWDM4 optical module for short and medium-distance 100G networks.
The 100G QSFP28 PSM4 optical module employs 8 parallel single-mode fibres to transmit data over a distance of roughly 500 meters; the 100G QSFP28 CWDM4 optical module can transmit data over a distance of up to 2 kilometers using single-mode fibers.
3. Long mode single-mode fiber: ≤10 km
The 100G QSFP28 LR4 optical module, which has a duplex LC interface and can transmit data over a distance of 10 km when used with single-mode fiber, is appropriate for long distance (greater than 2 km but less than 10 km) in 100G networks.
1. 40GBASE-SR4 optical module
It is the most often utilized module in 40G networks for short-distance transmission. The transmission distance of OM3 fiber optic patch cable is 100 meters when used with MPO/MTP interface multimode fiber optic patch cable.
To accomplish high bandwidth 40G transmission, the 40GBASE-SR4 optical module features four full-duplex channels that are also used for transmission across four channels, each allowing 10Gbps data transmission.
2. QSFP-40G-LR4 optical module
The 40GBASE-LR4 optical module is the most common long-distance transmission optical module. The 40GBASE-LR4 optical module can achieve a maximum transmission distance of 10 kilometers when combined with duplex LC interface single-mode fibre optic patch cords.
There are four separate transmit and receive channels on the optical module. The optical signal is multiplexed at the transmit end to combine all wavelengths for transmission, and then demultiplexed at the receiving end into four channels with a 10 Gbps transmission rate.
3. 3QSFP-40G-PSM4 Optical modulo
The 40GLR4PSM optical module is a four-channel, highly integrated module with a high port density and cheap cost. The optical module 40GLR4PSM functions in the same way as the 40GSR4QSFP+ optical module.
The distinction is that the 40GLR4PSM optical module uses single-mode patch cables to transport data over long distances of 40G, i.e., the parallel optical signals are sent in parallel over eight single-mode fibres. The maximum transmission range is 2 kilometers.
4. QSFP-40G-ER4 optical module
The 40GBASE-ER4 is the latest module to be introduced, and it employs an LC duplex interface with a single-mode patch cable, similar to the earlier LR4. The greatest transmission range is 40 kilometers.
The 40G QSFP+ optical module allows for high-density, low-cost, low-power 40G data transfer and has a bright future ahead of it.
It's critical to grasp the interface types, key models, and application scenarios of 40G QSFP+ before choosing the best optical module for your data equipment. We hope that this post has provided you with further information on 40G QSFP+ optical modules.
Equipment manufacturers of optical modules will encrypt their devices to varying degrees, also known as compatibility. Modules of a particular brand can only be used with devices of the same brand, and cannot be matched with other brand optical modules. Compatibility manufacturers need to conduct different compatibility adaptations on the optical modules. Whether or not they can perfectly solve compatibility issues is particularly important.
