Juniper Compatible 400GBASE-SR8 QSFP-DD PAM4 850nm 100m MTP/MPO FEC Optical Transceiver Module

QDD-400G-SR8 transceiver adopts 8x50Gb/s PAM-4 modulation, "S" is the abbreviation of short, which means short distance transmission, and "8" means there are 8 optical channels.

The main difference is the package, QDD-400G-SR8 is the QSFP-DD form factor and OSFP-400G-SR8 is the OSFP form factor. OSFP: OSFP stands for "Octal Small Form Factor Pluggable", the electrical interface of the OSFP connector consists of 8 electrical channels with 50Gb/s each, for a total bandwidth of 400Gb/s. QSFP-DD: QSFP-DD stands for "Quad Small Form Factor Pluggable (QSFP) - Dual Density (DD)". The electrical interface of the QSFP-DD connector has eight electrical channels running at 50Gb/s per channel for a total bandwidth of 400Gb/s. The QSFP-DD form factor is similar to the QSFP form factor except that a second row of electrical contacts has been added to increase the number of high-speed contacts, and the electrical channels have been increased from four (in the QSFP) to eight (in the QSFP-DD).

When matched with OM3 multimode fiber, the farthest transmission distance is 70m; with OM4 multimode fiber, the farthest transmission distance can reach 100m.