400G QSFP-DD LR4 Optical Transceiver – 10km LC SMF

SVNK 400G QSFP-DD LR4 Optical Transceiver (10 km, SMF)

The SVNK 400G QSFP-DD LR4 Optical Transceiver is a high-performance, long-reach module engineered to support 400 Gigabit Ethernet (400GbE) connectivity over single-mode fiber (SMF) with transmission distances of up to 10 kilometers. Designed for next-generation data centers, enterprise backbones, and cloud infrastructures, this transceiver enables reliable, high-speed optical interconnects for core, aggregation, and data center interconnect (DCI) applications.

Fully aligned with IEEE 802.3cu 400GBASE-LR4, the module uses four 100G PAM4 optical lanes multiplexed over CWDM wavelengths in the 1310 nm window, delivering an aggregate throughput of up to 425 Gb/s over a standard duplex LC fiber interface. This architecture allows 400G transmission using only two single-mode fibers, significantly improving fiber utilization while simplifying cabling infrastructure.

The optical engine integrates high-performance EML-based CWDM lasers and high-sensitivity receivers with integrated DSP and retiming, ensuring excellent signal integrity, low bit-error rates, and robust tolerance to chromatic dispersion and thermal variation across long-reach links.

Housed in a compact, hot-pluggable QSFP-DD Type-2 form factor, the SVNK 400G LR4 transceiver supports high port density, efficient thermal performance, and low power dissipation (<12 W). Built-in Digital Optical Monitoring (DOM/DDM) and an I²C management interface enable real-time diagnostics and proactive network management.

Key Features

• Hot-pluggable QSFP-DD Type-2 form factor
• Supports up to 425 Gb/s aggregate data rate
• Reach up to 10 km over single-mode fiber (SMF)
• 4 × 100G PAM4 CWDM optical lanes
• High-performance EML laser array
• 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 compliant with IEEE 802.3cu 400GBASE-LR4
• Integrated I²C management interface
• Built-in Digital Diagnostic Monitoring (DOM/DDM)
• RoHS compliant (lead-free)