Source Photonics SPQ-4E-LR-CDFT 400G-LR4 QSFP-DD 10km 1310nm SMF Transceiver Module for Data Center DCI

The Source Photonics SPQ-4E-LR-CDFT is a high-performance 400GBASE-LR4 QSFP-DD optical transceiver, designed for 10km transmission over single-mode fiber. Operating at 1295~1309nm (LWDM4) wavelength, it supports 400Gbps (4×100Gbps) signaling for medium-reach data center interconnections (DCI) and metro network applications. This module features a duplex LC connector, full DDM/DOM monitoring, and meets IEEE 802.3ck and QSFP-DD MSA standards.

Model Number

400GBASE-LR4 QSFP-DD

Band

Source Photonics

SOURCE Part Number

SPQ-4E-LR-CDFT

Form Factor

  QSFP-DD

Data Rate

400Gbps）

Transmission Distance

Up to10km

Fiber Type

Single-Mode Fiber (SMF)

Hot Pluggable

  Yes

Wavelength

1310nm

Connector Type

Duplex LC

Operating Temperature

0°C ~ 70°C

Country of Origin

   China

Supply Voltage

3.3V DC

Power Consumption

≤ 10W

• 400G Medium-Reach Data Center Interconnections (DCI)
• Metro Core/Access Network 400G Transport
• High-Speed 400G Ethernet Switch/Router Expansion
• 400GBASE-LR4 Standard Compliant Deployments

Product Highlights

• This transceiver is fully compliant with the IEEE 802.3cu 400GBASE-LR4 standard, delivering stable 400Gbps wire-speed transmission over standard G.652 single-mode fiber (SMF).
• It adopts a 4-lane 100G CWDM parallel optical architecture, operating at 1310nm band wavelengths, supporting a maximum reach of 10km over single-mode fiber.
• It features a duplex LC dual-fiber interface, eliminating the need for complex parallel ribbon cabling and simplifying data center and campus core wiring.

2. Standard QSFP-DD Package & Broad Compatibility

• It uses the industry-standard QSFP-DD (Double Density) hot-swappable package, designed for high port density in next-generation 400G switches and routers.
• The module is interoperable with mainstream QSFP-DD-compliant equipment from major vendors, including Arista, Cisco, Huawei, and others.
• Hot-plug-and-play design allows for easy installation, replacement, and capacity expansion without disrupting network operations.

3. Reliable Performance & Compliance Certification

• Built-in Digital Optical Monitoring (DOM) enables real-time monitoring of key parameters including TX optical power, RX optical power, module temperature, supply voltage, and laser bias current.
• Certified as a Class 1 Laser product under 21CFR 1040.10 and 1040.11, meeting global commercial and carrier-grade deployment requirements.
• Manufactured in China, it undergoes rigorous factory testing to ensure stable performance within the commercial temperature range.