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

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

The SVNK 400G FR4 Optical Transceiver is a high-performance, long-reach module designed to support 400 Gigabit Ethernet (400GbE) connectivity over single-mode fiber (SMF) with transmission distances of up to 2 kilometers. Engineered for next-generation data centers, cloud infrastructure, and high-capacity enterprise networks, this transceiver delivers reliable, high-speed optical interconnects with excellent power efficiency and signal integrity.

Based on 400GBASE-FR4 technology, the module transmits four parallel 100G PAM4 optical channels, multiplexed over CWDM wavelengths in the 1310 nm window, enabling full 400G throughput over a standard duplex LC fiber interface. This design allows two Ethernet switches or routers to be interconnected using only two single-mode fiber cores, simplifying cabling while maximizing bandwidth density.

The optical engine integrates high-performance 1310 nm EML laser arrays and high-sensitivity receivers with internal CDR and DSP retiming, ensuring stable transmission, low bit-error rates, and excellent tolerance to dispersion and thermal variation. Fully compliant with IEEE 802.3bs, 400GBASE-FR4 (100G Lambda MSA), and 400GAUI-8 / CEI-56G VSR PAM4 standards, the module offers broad platform interoperability.

Housed in a compact, hot-pluggable QSFP-DD form factor, the SVNK 400G FR4 transceiver supports high port density, low power consumption (<10W), and advanced digital diagnostics, making it ideal for dense switch environments and scalable network deployments.

Key Features

• Hot-pluggable QSFP-DD form factor
• Supports up to 400Gb/s aggregate data rate
• 4 × 100G PAM4 full-duplex channels
• High-performance 1310 nm EML laser array
• Reach up to 2 km over single-mode fiber (SMF)
• Duplex LC optical connector
• Integrated CDR/DSP on transmitter and receiver
• Power consumption < 10 W
• Commercial operating temperature: 0°C to +70°C
• Single 3.3 V power supply
• Built-in Digital Optical Monitoring (DOM/DDM)
• Compliant with IEEE 802.3bs, 400GBASE-FR4, 100G Lambda MSA, 400GAUI-8
• RoHS compliant (lead-free)