400G QSFP-DD Optical Transceivers

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Definition of **0G QSFP-DD Transceivers
QSFP-DD stands for Quad Small Form Factor Pluggable Double Density. The **0G QSFP-DD Transceiver follows the same port densities system as the QSFP and QSFP*8, but the QSFP-DD will support eight lanes instead of four lanes for the QSFP and QSFP*8, which double the density.
Each of the eight lanes will operate a data rate up to *0Gb/s providing a **0Gb/s data speed and increasing the capacity of the QSFP*8 by four. The **0G QSFP-DD MSA published that the size of the optical transceivers enables to put *6 ports in one switch slot, accumulating *4.4 Tbp/s in one slot.
 
Multi-mode Transceivers
Multi-mode transceivers are the low cost transceivers.  QSFP-DD SR8 use more expensive non-standard MPO connectors which cancel out some of the cost savings of the multi-mode transceiver.
**0G QSFP-DD SR8
The **0G QSFP-DD SR8 transceiver supports connections of up to **0 meters over multi-mode fiber and uses MPO connectors. The wavelength is **0nm. It is compliant with the QSFP-DD MSA.
 
Single-mode Transceivers
Single-Mode transceivers are more expensive than multi-mode transceivers but they allow to reach longer distance.
**0G QSFP-DD DR4
The **0G QSFP-DD DR4 transceiver supports connections of up to **0 meters over single-mode fiber and uses MPO connector. The wavelengths is ***0nm. It is compliant with the QSFP-DD MSA.
**0G QSFP-DD DR4+
The **0G QSFP-DD DR4+ supports connections of up to 2 kilometers over single-mode fiber and uses MPO connector. The wavelengths is ***0nm. It is compliant with the QSFP-DD MSA.
**0G QSFP-DD LR4
The **0G QSFP-DD LR4 transceiver supports connections of up to *0 kilometers over single-mode fiber and uses LC connectors. The wavelengths are ***6 to ***9nm. It is compliant with the QSFP-DD MSA.
 
**0G QSFP-DD Loopback
The **0G QSFP-DD Loopback is a cost effective and high quality solutions to test **0G QSFP-DD transceivers ports.