Kevin Redner, PLM Datacom, discusses recent product introductions and our live 100G demo at OFC 2017.
QSFP28 SR4 Optical Transceiver for Multimode Fiber (MMF)
The Lumentum 100G QSFP28 SR4 optical transceiver is a full duplex, photonic-integrated optical transceiver. It provides a high-speed link at an aggregated data rate of 103.125 Gbps on up to 100 m of OM4 multimode fiber (70 m on OM3 MMF). Optimal operation at 103.125 Gbps requires the host system to enable Reed- Solomon Forward Error Correction (RS-FEC) compliant with IEEE Std 802.3-2015 Clause 91. For 100G SR4 applications the RS-FEC sublayer shall implement RS(528,514). This ensures post FEC bit error ratio (BER) of better than 1x10-12 with pre-FEC optical link BER of 5x10-5.
The Lumentum 100G QSFP28 SR4 optical transceiver integrates transmit and receive paths in one module. On the transmit side, four lanes of serial electrical data from the host are converted to four NRZ encoded optical signals. The optical signals are then coupled to an industry standard 12-port multimode MPO connector. On the receive side, four optical data streams are collected through the module’s MPO receptacle and passed to a PIN photodetector-based optical receiver. Data from the recovered optical signals are converted to electrical signals and presented on the receive output pins of the device’s electrical port.
This module features a hot-pluggable electrical interface, low power consumption and 2-wire I2C management interface.