400G QSFP-DD FR4 Optical Transceiver – 2km LC SMF

SVNK 400G QSFP-DD FR4 Optical Transceiver (2 km, SMF)

The SVNK 400G QSFP-DD FR4 Optical Transceiver is a high-performance, hot-pluggable module engineered to support 400 Gigabit Ethernet (400GbE) connectivity over single-mode fiber (SMF) with transmission distances of up to 2 km. Designed for modern data centers, cloud infrastructure, and enterprise backbones, this transceiver enables reliable, scalable, and power-efficient 400G links for next-generation network architectures.

Fully aligned with IEEE 802.3cu 400GBASE-FR4, the module uses four 100G PAM4 optical lanes multiplexed over CWDM wavelengths to deliver an aggregate data rate of up to 425 Gb/s. On the electrical side, it supports a 400GAUI-8 interface (8 × 50G PAM4) with integrated retiming, ensuring excellent signal integrity, low jitter, and robust system margins.

The optical engine integrates high-performance 1310 nm EML-based CWDM transmitters and high-sensitivity receivers, enabling stable medium-reach transmission with strong dispersion tolerance and thermal stability. A compact duplex LC optical interface supports efficient fiber utilization and simplified cabling compared to parallel-fiber solutions.

Housed in a compact QSFP-DD Type-2 form factor, the module supports hot-plug operation, high port density, and efficient thermal management. Built-in Digital Optical Monitoring (DOM/DDM) via an I²C management interface allows real-time diagnostics and proactive network maintenance.

Key Features

• Hot-pluggable QSFP-DD Type-2 form factor
• Supports up to 425 Gb/s aggregate data rate
• Maximum reach up to 2 km over single-mode fiber (SMF)
• 4 × 100G PAM4 CWDM optical lanes
• 1310 nm EML-based transmitters
• 8 × 50G PAM4 retimed 400GAUI-8 electrical interface
• Duplex LC optical connector
• Power dissipation < 12 W
• Single 3.3 V power supply
• Commercial operating temperature: 0°C to 70°C
• Fully aligned with IEEE 802.3cu 400GBASE-FR4
• Integrated I²C management interface
• Built-in Digital Diagnostic Monitoring (DOM/DDM)
• RoHS compliant (lead-free)