In the Mellanox booth, we showed a static demo of our new 400G SR8 transceiver.
Using two 200G SR4s integrated onto a single PCB and optical connector, Mellanox showed a 400G SR8 transceiver in the large OSFP form-factor – Octal Small Form-factor Plug. This design uses the 16-fiber, MPO-16 optical connector and standard OM3/OM4 multi-mode fiber in the 850nm band for short reach applications up to 100 meters.
The 400G SR8 can be split out to multiple QSFP56 or SFP-DD transceivers using a MPO-16 -to- MPO-12 fiber break out cables into:
The 100G links can use the currently available QSFP56 with the MPO optical connector or the new SFP-DD form-factor still in the final stages of standardization by the SFP-DD committee. However, at this time the industry has not determined the new 2-channel (4 fiber) optical connector standard for the SFP-DD.
The 400G-to-400G and 400G-to-dual 200G links can be used to connect leaf spine links over short reaches of <100meters. The Quad 100G links can be used to connect to servers and storage subsystems. This approach is much less expensive that using single-mode transceivers for short reach applications.