400GBASE-DR4 QSFP-DD Compatible Transceiver: 400G-QSFP-DD-500

Our EDGEOPTIC 400G-QSFP-DD-500 is a multi-vendor compatible 400GBASE-DR4 QSFP-DD optical transceiver module designed for high-capacity 400 Gigabit Ethernet applications utilizing parallel single-mode fiber architecture. The 400G-QSFP-DD-500 module employs 4-lane PSM4 (Parallel Single Mode 4) technology operating at 1310 nm wavelength, with each lane transmitting at 106.25 Gbps using PAM4 modulation to achieve an aggregate data rate of 425 Gbps. This parallel fiber approach delivers maximum bandwidth efficiency for short-reach data center interconnects utilizing MPO-based cabling infrastructure.

Our 400GBASE-DR4 QSFP-DD transceiver utilizes EML (Electro-absorption Modulated Laser) transmitters for each of the four parallel lanes, providing precise optical characteristics required for high-speed PAM4 transmission. The receiver section incorporates PIN photodiodes optimized for 1310 nm operation across all lanes. The module ensures a 3 dB guaranteed optical link budget, supporting transmission distances up to 500 meters 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-500 compatible 400GBASE-DR4 module is a hot-pluggable QSFP-DD form factor transceiver with MTP/MPO-12 APC connector as the optical interface, utilizing 8 fibers (4 transmit, 4 receive) for parallel transmission. The electrical interface conforms to QSFP-DD MSA and IEEE 802.3cd specifications, ensuring compatibility with standard QSFP-DD host systems across multiple vendor equipment platforms. Our 400GBASE-DR4 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 lane, module temperature, bias current, and supply voltage. This diagnostic data is accessible via the MSA-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 10W, suitable for high-density leaf-spine deployments.

Standards compliance includes IEEE 802.3cd 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-DR4 QSFP-DD transceiver is CE/RoHS certified and compliant with Class 1 FDA and IEC60825-1 laser safety standards.

Typical applications include intra-data center interconnects, top-of-rack to spine switch connections, and high-performance computing clusters leveraging structured MPO cabling systems. The DR4 breakout capability also enables 4x100G connectivity to individual 100GBASE-DR ports. Because our focus is providing top quality service, we perform comprehensive quality verification before delivery including optical parameter measurements across all lanes, connector cleanliness inspection, and QSFP-DD transceiver EEPROM memory validation tests.