QSFP28 4WDM-10 Optical Transceiver – Up to 10 km Reach for 100G FEC-Enabled Systems
LQ2 Series

The Lumentum 100G QSFP28 4WDM-10 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 10 km of single mode fiber with a maximum link budget of 9.5 dB when maximum transmitter and dispersion penalty (TDP) of 3 dB is present. Operation at 103.125 Gbps requires the host system to enable Reed-Solomon Forward Error Correction (RS-FEC) compliant with IEEE Std 802.3 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 4WDM-10 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.
Features
- Optical line rate of 103.125 Gbps (4 x 25.78125 Gbps)
- Requires host system to enable RS-FEC RS (528, 514) in accordance with IEEE802.3 clause 91
- Supports up to 6.5 dB channel insertion loss including up to 10 km of single-mode fiber
- Operating case temperature range from 0ºC to 70ºC
- Tx and Rx re-timers
- External reference clock is not required
- Power dissipation < 3.5 W
- Single 3.3 V power supply
- Integrated CWDM TOSA/ROSA
- Duplex single mode LC optical receptacle
- 100G 4WDM-10 MSA Technical Specification Rev 1.2
- CAUI-4 chip-to-module 100G four-lane electrical interface per IEEE 802.3 Annex 83E compliant
- Supports 40G Operation
- Supports digital diagnostic monitoring
- Hot pluggable 38-pin electrical interface
- 2-wire I2C management interface
Applications
- Local area networks (LAN)
- Wide area networks (WAN)
- Ethernet switches and router applications
Compliance
- 100G 4WDM-10 MSA Technical Specification Rev 1.2
- IEEE 802.3bm CAUI-4 chip to module electrical standard
- SFF-8661 Rev 2.3 QSFP28 Module Mechanical
- SFF-8679 Rev 1.7 QSFP28 Base Electrical
- SFF-8636 Rev 2.6 Common Management Interface
- Class 1 laser safety
- Tested in accordance with Telcordia GR-468