A comprehensive portfolio of 400G QSFP-DD optical transceivers is available at Sourcelight. The series of products comply with IEEE 802.3bs and QSFP-DD MSA standards and are mainly applied in 400G Ethernet, Data Center and Cloud Networks.
| Picture | Model | Product Description | Data Rate | Reach | Tx | Rx | Connector |
 | SLQSDD-400G-SR4B | QSFP-DD SR4 BIDI | 400Gbit/s | 150m | VCSEL | PIN | MTP/MPO-12 MM |
| SLQS-DD-400G-SR8 | QSFP-DD SR8 | 400Gbit/s | 100m | VCSEL Array | PIN | MTP/MPO-16 MM |
 | SLQS-DD-400G-DR4 | QSFP-DD DR4 | 400Gbit/s | 500m | 4CWDM EML | PIN | MTP/MPO-12 SM |
| SLQS-DD-400G-DR4+ | QSFP-DD DR4+ | 400Gbit/s | 2km | 4CWDM EML | PIN | MTP/MPO-12 SM |
 | SLQS-DD-400G-FR4 | QSFP-DD FR4 | 400Gbit/s | 2km | 4CWDM EML | PIN | Duplex LC SM |
 | SLQSDD-400G-PLR4 | QSFP-DD PLR4 | 400Gbit/s | 10km | EML | PIN | MTP/MPO-12 SM |
| SLQS-DD-400G-LR4 | QSFP-DD LR4 | 400Gbit/s | 10km | 4CWDM EML | PIN | Duplex LC SM |
 | SLQSDD-400G-ER4L | QSFP-DD ER4L | 400Gbit/s | 30km | 4LWDM EML | TIA 4CH & APD Array | Duplex LC SM |
