• 400G QSFP-DD DR4 Optical Transceiver 1310nm 500m SMF MPO-12 PAM4

400G QSFP-DD DR4 Optical Transceiver 1310nm 500m SMF MPO-12 PAM4

400G QSFP-DD DR4 optical transceiver using 1310nm PAM4 technology with MPO-12 interface. Supports up to 500m single-mode fiber for data center and AI networking applications.

SKU 400G-QSFP-DD-DR4-500M Category
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The 400G QSFP-DD DR4 Optical Transceiver is a high-performance single-mode optical module designed for long-reach 400G Ethernet applications in modern data center and metro interconnect networks. It uses four 100G PAM4 optical lanes over 1310nm wavelength technology to deliver an aggregate bandwidth of 400Gbps with excellent signal integrity and low latency.

Built in the QSFP-DD form factor, this module provides a compact, high-density solution for next-generation switching platforms. With support for up to 500m transmission over single-mode fiber, it is widely deployed in AI infrastructure, hyperscale cloud networks, and data center spine-leaf architectures requiring efficient 400G optical connectivity.
Data Rate400Gbps (4×100G PAM4)
ModulationPAM4
Wavelength1310nm
Transmission TypeDR4 (Single-mode parallel optics)
Fiber TypeSingle-Mode Fiber (SMF)
ConnectorMPO-12
Lane Configuration4 × 100G
Transmission DistanceUp to 500m
Laser TypeEML / DFB (typical implementation)
Power Consumption≤ 10–12W (typical)
Temperature Range0°C to +70°C (Commercial)
DDM SupportYes
ComplianceQSFP-DD MSA | IEEE 802.3bs/ck | RoHS
  • Supports 400Gbps aggregate data rate
  • 4×100G PAM4 optical lanes (DR4 architecture)
  • 1310nm wavelength optimized for single-mode fiber
  • Up to 500m transmission distance over SMF
  • QSFP-DD high-density hot-pluggable form factor
  • MPO-12 optical interface for parallel transmission
  • Low power consumption optimized for data center use
  • High signal integrity with low bit error rate
  • Digital Diagnostic Monitoring (DDM) support
  • Compliant with QSFP-DD MSA and IEEE standards
  • RoHS compliant and environmentally friendly design
  • 400G data center interconnect (DCI)
  • Hyperscale cloud infrastructure
  • AI and machine learning clusters
  • Spine-leaf architecture in modern data centers
  • High-speed backbone aggregation networks
  • Metro and enterprise core networks

We provide full OEM and customization services for global network deployments. Options include customized labeling, EEPROM programming, firmware compatibility coding for major vendors (Cisco, Arista, Juniper, NVIDIA, etc.), and tailored packaging. We also support engineering-level customization such as optical tuning, power optimization, and system-level interoperability validation.

Q1: What does DR4 mean in 400G optics?
A: DR4 refers to four parallel 100G lanes over single-mode fiber using PAM4 modulation, enabling 400G total throughput.

Q2: What is the advantage of QSFP-DD over QSFP56 or OSFP?
A: QSFP-DD offers higher port density while maintaining backward compatibility with QSFP form factors, making it ideal for scalable 400G deployments.

Q3: Can this module really support 500m transmission?
A: Yes, it is designed for up to 500 meters over standard single-mode fiber under proper link budget conditions.

Q4: What type of fiber and connector are required?
A: It uses single-mode fiber (SMF) with MPO-12 parallel optic connectors.

Q5: Is this suitable for AI and cloud data centers?
A: Yes, it is widely used in AI clusters and hyperscale environments requiring high-bandwidth, low-latency interconnects.

Q6: What is the difference between DR4 and SR8?
A: DR4 uses single-mode fiber with longer reach (up to 500m), while SR8 uses multimode fiber for shorter distances (typically up to 100m).

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