400GBASE-ER8 QSFP-DD Compatible Transceiver: 400G-QSFP-DD-40

Our EDGEOPTIC 400G-QSFP-DD-40 is a multi-vendor compatible 400GBASE-ER8 QSFP-DD optical transceiver module designed for extended-reach 400 Gigabit Ethernet applications over single-mode fiber infrastructure. The 400G-QSFP-DD-40 module employs 8-channel LAN-WDM technology operating at wavelengths 1273.54, 1277.89, 1282.26, 1286.66, 1295.56, 1300.05, 1304.58, and 1309.14 nm, with each lane transmitting at 53.125 Gbps using PAM4 modulation to achieve an aggregate data rate of 425 Gbps. This 8-wavelength architecture provides exceptional reach capability while maintaining duplex fiber connectivity for metropolitan and regional network deployments.

Our 400GBASE-ER8 QSFP-DD transceiver utilizes EML (Electro-absorption Modulated Laser) transmitters for each of the eight wavelength channels, providing high output power and precise spectral characteristics required for extended-distance LAN-WDM transmission. The receiver section incorporates PIN photodiodes optimized for the extended LWDM wavelength grid spanning 37.64 nm bandwidth, delivering reliable reception over longer fiber spans. The module ensures an 18 dB guaranteed optical link budget, supporting transmission distances up to 40 kilometers over standard single-mode fiber. However, distance is an indicative parameter calculated for identification purposes – ultimately we calculate reach taking into account minimal optical budget and average attenuation characteristics of the deployed fiber plant.

The 400G-QSFP-DD-40 compatible 400GBASE-ER8 module is a hot-pluggable QSFP-DD form factor transceiver with duplex LC/UPC connectors as the optical interface. The electrical interface conforms to QSFP-DD MSA, CMIS V4.0, and IEEE 802.3bs specifications, ensuring compatibility with standard QSFP-DD host systems across multiple vendor equipment platforms. Our 400GBASE-ER8 QSFP-DD transceiver can be encoded for compatibility with latest platforms from leading vendors including Cisco, Juniper, Arista, Nokia, Huawei, and other major network equipment manufacturers. The module supports host-side Forward Error Correction and incorporates CDR (Clock and Data Recovery) functionality on all electrical lanes.

The transceiver includes DDM/DOM (Digital Diagnostic Monitoring) capability providing real-time operational parameters including transmitted and received optical power levels per wavelength channel, module temperature, bias current, and supply voltage. This diagnostic data is accessible via the CMIS-compatible management interface, enabling comprehensive monitoring of transceiver health and performance. The module operates within a 0 to 70°C commercial temperature range with maximum power consumption of 15.4W, requiring appropriate thermal management considerations in deployment scenarios.

Standards compliance includes IEEE 802.3bs for 400 Gigabit Ethernet and 100G Lambda MSA specifications for the optical interface. The transceiver achieves multi-vendor interoperability through adherence to industry QSFP-DD MSA standards, though equipment with vendor-specific module authentication may require custom EEPROM programming for full compatibility. Our 400GBASE-ER8 QSFP-DD transceiver is CE/RoHS certified and compliant with Class 1 FDA and IEC60825-1 laser safety standards.

Typical applications include metropolitan area network interconnects, inter-data center connections, regional backbone links, and carrier-grade deployments requiring high-bandwidth connectivity over extended distances with duplex fiber efficiency. The ER8 architecture maximizes reach while leveraging existing duplex fiber infrastructure. Because our focus is providing top quality service, we perform comprehensive quality verification before delivery including optical parameter measurements across all eight wavelength channels, connector cleanliness inspection, and QSFP-DD transceiver EEPROM memory validation tests.