Quad small form pluggable double density (QSFP-DD) transceivers maximize port economy and density by utilizing multiple lanes of data. QSFP-DD fiber transceivers utilize eight lanes as opposed to the four lanes of a QSFP+ optic.
QSFP-DD Transceivers
Misc.

34160024-001-AO
Huawei® 34160024-001 Compatible TAA 400GBase-FR4 QSFP-DD Transceiver (SMF, 1310nm, 2km, LC, DOM, 0 to 70C)

QDD-400GB-LR4-HW2-AO
Huawei® Compatible TAA 400GBase-LR4 QSFP-DD Transceiver (SMF, 1310nm, 10km, LC)

34160017-AO
Huawei® 34160017 Compatible TAA 400GBase-LR4 QSFP-DD Transceiver (SMF, 1310nm, 10km, LC)

QDD-400GB-LR8-HW2-AO
Huawei® Compatible TAA 400GBase-LR8 PAM4 QSFP-DD Transceiver (SMF, 1270nm to 1330nm, 10km, LC, DOM, CMIS 4.0)

02312NPJ-AO
Huawei® 02312NPJ Compatible TAA 400GBase-FR4 QSFP-DD Transceiver (SMF, 1310nm, 2km, LC, DOM, 0 to 70C)

QDD400GBDCOZRP4DBM-HW-ST02-AO
Huawei® Compatible TAA 400GBase-Open ZR+ Coherent QSFP-DD Transceiver (SMF, Tunable, 120km, LC, DOM, 4dBm)

02312NPK-AO
Huawei® 02312NPK Compatible TAA 400GBase-LR8 PAM4 QSFP-DD Transceiver (SMF, 1270nm to 1330nm, 10km, LC, DOM, CMIS 4.0)

QDD400GBDCOZRP4DBM-HW-ST01-AO
Huawei® Compatible TAA 400GBase-Open ZR+ Coherent QSFP-DD Transceiver (SMF, Tunable, 120km, LC, DOM, 4dBm)

QDD-400GB-SR8-HW2-AO
Huawei® Compatible TAA 400GBase-SR8 QSFP-DD Transceiver (MMF, 850nm, 70m, MPO-16, DOM)

02312NPH-AO
Huawei® 02312NPH Compatible TAA 400GBase-DR4 QSFP-DD Transceiver (SMF, 1310nm, 500m, MPO, DOM)