400GBASE-LR4 QSFP-DD Compatible Transceiver: 400G-QSFP-DD-11

The EdgeOptic 400G-QSFP-DD-11 is a 400GBASE-LR4 QSFP-DD optical transceiver compatible with multiple vendor platforms. It supports 400 Gigabit Ethernet over single-mode fiber using 4-channel CWDM at 1271, 1291, 1311, and 1331 nm wavelengths. Each lane carries 106.25 Gbps with PAM4 modulation, for an aggregate data rate of 425 Gbps over duplex fiber connections.

The transmitter section uses EML (Electro-absorption Modulated Laser) sources on each wavelength channel for 100G-per-lane CWDM transmission. The receiver section uses PIN photodiodes matched to the CWDM wavelength grid. The average optical link budget is 7.1 dB, with a rated transmission distance of 10 km over standard single-mode fiber. Distance is an indicative parameter; actual reach depends on the available optical budget and the attenuation characteristics of the deployed fiber plant.

The module is a hot-pluggable QSFP-DD form factor with duplex LC/UPC connectors. Its electrical interface conforms to QSFP-DD MSA and CMIS V4.0 specifications, making it compatible with standard QSFP-DD host systems from multiple vendors. Each module is programmed with EEPROM coding for the intended host vendor so the switch port recognizes it correctly. Host-side Forward Error Correction is supported, and CDR (Clock and Data Recovery) is included on all electrical lanes.

DDM/DOM (Digital Diagnostic Monitoring) provides real-time readings of transmitted and received optical power per wavelength channel, module temperature, bias current, and supply voltage. This data is accessible through the CMIS-compatible management interface for ongoing monitoring of transceiver health and performance. The operating temperature range is 0 to 70 °C commercial, with maximum power consumption of 9 W. Appropriate thermal management should be considered in high-density deployments.

The module complies with IEEE 802.3bs for 400 Gigabit Ethernet and 100G Lambda MSA for the optical interface. Multi-vendor interoperability follows from adherence to QSFP-DD MSA standards, though equipment with vendor-specific module authentication may require custom EEPROM programming. The transceiver is CE/RoHS certified and compliant with Class 1 FDA and IEC60825-1 laser safety standards.

Common applications include data center interconnects, metropolitan area network links, enterprise campus backbones, and cloud infrastructure deployments over intermediate distances. The CWDM architecture offers spectral efficiency while remaining compatible with existing single-mode fiber plants. Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms, the 400G-QSFP-DD-11 is made to order on a 2-week lead time and ships with a lifetime warranty.