400G ZR Coherent QSFP-DD DCO Transceiver: 400G-QDD-DCO-ZR

Our EDGEOPTIC 400G-QDD-DCO-ZR is a multi-vendor compatible 400G ZR coherent QSFP-DD DCO (Digital Coherent Optics) transceiver module designed for long-haul 400 Gigabit Ethernet applications over single-mode fiber infrastructure. The 400G-QDD-DCO-ZR module employs advanced coherent transmission technology utilizing DP-16QAM (Dual Polarization 16-Quadrature Amplitude Modulation) to achieve an aggregate data rate of 425 Gbps over a single wavelength. This tunable C-Band DWDM transceiver supports ITU-T grid channels 13 through 61 with 75 GHz or 100 GHz spacing, enabling flexible wavelength assignment for DWDM network deployments.

Our 400G ZR coherent QSFP-DD transceiver utilizes an ITLA (Integrable Tunable Laser Assembly) transmitter providing precise wavelength control across the full C-Band spectrum, enabling software-defined wavelength provisioning without hardware changes. The receiver section incorporates an ICR (Integrated Coherent Receiver) with advanced DSP processing for polarization and phase recovery. The module ensures a 10 dB guaranteed optical link budget, supporting transmission distances up to 120 kilometers over amplified single-mode fiber spans, or approximately 40 kilometers unamplified. However, distance is an indicative parameter calculated for identification purposes – ultimately we calculate reach taking into account optical amplification, fiber characteristics, and OSNR requirements of the deployed network.

The 400G-QDD-DCO-ZR compatible coherent 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 V5.0, 400GAUI-8, and OIF Coherent CMIS specifications, ensuring compatibility with standard QSFP-DD host systems across multiple vendor equipment platforms. Our 400G ZR coherent 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 features integrated Forward Error Correction within the onboard DSP, eliminating dependency on host-side FEC implementation, and incorporates CDR (Clock and Data Recovery) functionality.

The transceiver includes DDM/DOM (Digital Diagnostic Monitoring) capability providing real-time operational parameters including transmitted and received optical power, OSNR monitoring, chromatic dispersion compensation status, module temperature, and laser frequency. This comprehensive diagnostic data is accessible via the CMIS-compatible management interface, enabling detailed monitoring of coherent transceiver health and optical path performance. The module operates within a 0 to 70°C commercial temperature range with maximum power consumption of 18W, requiring appropriate thermal management for sustained operation.

Standards compliance includes OIF 400ZR Implementation Agreement, QSFP-DD MSA, and OIF Coherent CMIS specifications. The transceiver achieves multi-vendor interoperability through adherence to industry-standard coherent specifications, though equipment with vendor-specific module authentication may require custom EEPROM programming for full compatibility. Our 400G ZR coherent QSFP-DD transceiver is RoHS certified.

Typical applications include data center interconnects over metro distances, regional backbone links, carrier-grade DWDM networks, and point-to-point connections requiring high-capacity coherent transmission. The ZR architecture brings coherent technology into the compact QSFP-DD form factor, enabling IP-over-DWDM deployments without external transponders. Because our focus is providing top quality service, we perform comprehensive quality verification before delivery including coherent optical parameter measurements, wavelength accuracy verification, connector cleanliness inspection, and QSFP-DD transceiver EEPROM memory validation tests.