Kevin Affolter, Senior Director, PLM, Datacom, details the latest long-reach products.
QSFP28 Optical Transceiver – 100 Gigabit Ethernet for up to 10 km Reach
The Lumentum 100G QSFP28 LR4 optical transceiver is a full duplex, photonic-integrated optical transceiver that provides a high-speed link at aggregated data rate of either 103.125 Gbps or 111.81 Gbps over up to 10 km of SMF28. The module complies with IEEE 802.3-2015 Clause 88 and 83E standard and ITU-T G.959.1-2016-04.
The transceiver integrates the receive and transmit path on one module. On the transmit side, four lanes of serial data are recovered by a programmable continuous time linear equalizer (CTLE), retimed and passed to four laser drivers, which control four lasers with center wavelengths of 1296 nm, 1300 nm, 1305 nm and 1309 nm. The optical signals are multiplexed to a single-mode fiber through an industry standard LC connector. On the receive side, four lanes of optical data streams are optically de-multiplexed by an integrated optical demultiplexer. Each data stream is recovered by a PIN photodetector transimpedance amplifier, retimed and passed to a CAUI-4 compliant output driver.
This module features a hot-pluggable electrical interface, low power consumption and 2-wire I2C management interface.