Sky Optics 400G QSFP-DD DR4 is a parallel single-mode optical transceiver following 400GBASE-DR4 standard with four-lane 1310nm EML laser array. It delivers total 425Gbps transmission speed and achieves stable 500m signal transmission over standard G.652 single-mode fiber via MPO12-APC interface with 4×100G DR1 breakout capability.

Featuring standard QSFP-DD hot-pluggable structure, the module has a low power consumption within 8W and works stably at 0℃-70℃. It integrates complete I²C DDM monitoring and CMIS4.0 protocol, and the parallel single-mode design delivers excellent bending resistance, adapting to complex on-site wiring environments.

With balanced cost and transmission performance, DR4 is widely deployed in data center leaf-spine interconnection, AI computer room internal links and enterprise single-mode IDC upgrades. It supports 4×100G breakout application, being the mainstream mid-short reach single-mode solution for 400G data center construction.