Sate Optics provides compatible 400G QSFP-DD Loopback Modules for high-speed network testing, equipment diagnostics and optical interface verification in next-generation data centers.
Our 400G QSFP-DD Loopback solutions are designed to simulate optical transceiver connections, enabling engineers to perform port testing, system validation and troubleshooting on high-performance networking equipment.
Compatible 400G QSFP-DD Loopback Modules support high-speed Ethernet testing applications in data centers, AI infrastructure, cloud computing environments and advanced optical networks.
Sate Optics delivers reliable testing solutions for 400G network deployments, helping customers verify connectivity and maintain high-performance infrastructure.
400G QSFP-DD Loopback
| Part Number | Model No. | Picture | Data Rate(Mbps) | Wavelength | Media Type | Reach | TX Power(dBm) | RX Sens.(dBm) | Temp.(℃) | Note | Datasheet |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ST-400G-QSFPDD-LB0-0 | 400G-QSFPDD-LB0-0 | ![]() |
400G | / | Copper | / | 0dBm | 0W | 0°C~85°C | 400G Passive Loopback | |
| ST-400G-QSFPDD-LB0-10 | 400G-QSFPDD-LB0-10 | ![]() |
400G | / | Copper | / | 0dBm | 10W | 0°C~85°C | 400G Passive Loopback | |
| ST-400G-QSFPDD-LB0-X | 400G-QSFPDD-LB0-X | ![]() |
400G | / | Copper | / | 0dBm | Programmable 1.5W-15W | 0°C~85°C | 400G Passive Loopback |



