400GBASE-FR4 QSFP-DD 2km 1310nm SMF Optical Transceiver Module
The 400GBASE-FR4 QSFP-DD 2km 1310nm SMF optical transceiver is purpose-built for today’s most demanding network infrastructures. Leveraging the compact QSFP-DD form factor, this 400 Gb/s module delivers reliable, low-power performance over single-mode fiber spans of up to 2 km. Its precision-tuned 1310 nm optics ensure minimal dispersion and superior signal integrity, making it an ideal choice for high-density data center interconnects, metro backbones, and cloud backbone links.
Designed for seamless integration, the 400G QSFP-DD FR4 2km single-mode fiber transceiver supports hot-pluggable installation and vendor-agnostic compatibility. Whether you’re upgrading spine-leaf architectures, aggregating carrier Ethernet traffic, or extending HPC and SAN fabrics, this module ensures full 400 Gb/s line rate with enterprise-grade reliability.
| Part Number | GL4H-QDSM31FR4C | Tx Power (dBm) | -3.3~3.5 |
| Product | 400G QSFP-DD FR4 | Rx Power (dBm) | -7.3 |
| Max Data Rate | 425Gbps (4×106.25Gb/s) | Distance | 2km |
| Wavelength | 1271nm,1291nm, 1311nm,1331nm | Connector | Duplex LC/UPC |
| Laser Type (TX/RX) | EML/PIN | Temp | 0~70°C |
Data center interconnect (DCI)
Metro networks requiring high-density 400G links
Cloud backbone with plug-and-play 2 km 400G FR4 QSFP-DD
- High Bandwidth Density: The module adopts PAM4 modulation technology, which enables higher-capacity data transmission in limited space and is suitable for high-density network environments such as data centers.
- Low Power Design: 400G QSFP-DD FR4 Optical Module adopts advanced low power design, which effectively reduces energy consumption and meets the trend of sustainable development.
- Transmission Rate and Distance: The module supports 400Gbps transmission rate and can achieve up to 2km transmission distance over single mode fiber (SMF).
- Multi-Channel Design: The module contains four independent channels, each with a rate of 100Gbps and a total bandwidth of 400Gbps. These channels use CWDM technology, with center wavelengths of 1271nm, 1291nm, 1311nm, and 1331nm, respectively.
- Interface type: Duplex LC connector for single mode fiber (SMF) and compliant with QSFP-DD MSA standard.
- Compatibility: The module follows IEEE 802.3cu-2021 and 400G-FR4 specifications and is compatible with QSFP-DD MSA and CMIS standards, ensuring broad compatibility and interoperability.
- Operating Temperature Range: Modules operate over a temperature range of 0°C to 70°C, accommodating a wide range of environmental conditions.
- Power Requirements: Modules are typically powered from a single 3.3V supply and consume less than 11W.
FAQ About 400GBASE-FR4 QSFP-DD Optical Transceiver
A 400GBASE-FR4 QSFP-DD 2 km 1310 nm SMF optical transceiver is a 400 Gb/s pluggable module in the QSFP-DD form factor that uses 1310 nm optics over single-mode fiber to reliably carry data up to 2 km, ideal for high-throughput links.
The 400G FR4 QSFP-DD transceiver for data center interconnect provides ultra-high bandwidth and low latency between data halls or campus sites, reducing bottlenecks in spine-leaf architectures and enabling seamless multi-site failover.
A high-density 400G QSFP-DD FR4 transceiver for metro networks fits more ports in a single switch line card, maximizes fiber utilization in carrier rings, and supports scalable 400 Gb/s links across metropolitan backbones.
The plug-and-play 2 km 400G FR4 QSFP-DD module features hot-swappable installation, automatic link configuration, and vendor-agnostic compatibility—simply insert into any QSFP-DD port for instant 400 Gb/s connectivity.
The primary differences between 400G QSFP-DD FR4 vs FR8 transceivers are reach and dispersion tolerance: FR4 supports up to 2 km on SMF at 1310 nm, while FR8 extends to 10 km with enhanced dispersion compensation at the same wavelength.
400GBASE-FR4 QSFP-DD module price varies by volume, lead time, and support level; contact your Fibrecross sales representative with your required quantities and delivery schedule to receive a customized quote.
