What’s 100G PSM4 QSFP28 Transceiver?
Defined by the 100G PSM4 MSA, 100GBASE-PSM4 QSFP28 transceiver is a transceiver with parallel technology. It uses four lanes of parallel ribbon fiber delivering serialized data at a rate of 25 Gbps per lane (See the picture below).
The light source of PSM4 optic module is a single uncooled distributed feedback (DFB) laser operating at 1310nm.
100g PSM4 QSFP28 transceiver doesn’t need a MUX/DEMUX for each laser but it does need either a directly modulated DFB laser (DML) or an external modulator for each fiber.
A PSM4 QSFP28 module supports link lengths of up to 500 meters over single-mode fiber with 12 fiber MTP/MPO connectors.
