QSFP28 CWDM4 Optical Transceiver — Up to 2 km reach for 100G FEC-enabled systems
The Lumentum 100G QSFP28 CWDM4 Optical Transceiver is a full duplex, photonic-integrated optic transceiver that provides a high-speed link at aggregated data rate of 103.13 Gbps over 2 km of single mode fiber with a maximum link budget of 8 dB when maximum transmitter and dispersion penalty (TDP) of 3 dB is presented. Operation at 103.125 Gbps requires the host system to enable Reed-Solomon Forward Error Correction (RS-FEC) compliant with IEEE Std 802.3bj clause 91. For CWDM4 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 CWDM4 Optical Transceiver integrates transmit and receive path in 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 1271 nm, 1291 nm, 1311 nm and 1331 nm. The optical signals are then multiplexed into 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.