400GBASE-SR8 QSFP-DD 850nm 100m DOM MPO-16/APC MMF Optical Transceiver Module
The 400GBASE-SR8 QSFP-DD Optical Transceiver is a high-performance, hot-pluggable module designed for short-reach data center interconnects over multimode fiber (MMF). Operating over 8 parallel lanes at 53.125Gbps per lane, this transceiver provides a total throughput of 400Gbps and supports transmission distances of up to 100 meters over OM4 MMF via an MPO-16/APC connector.
Engineered for next-generation high-speed data center environments, this module complies with IEEE 802.3cd, 400GAUI-8, and QSFP-DD MSA standards. It uses 850nm VCSEL laser technology and features digital diagnostics monitoring (DOM) to ensure real-time performance monitoring and enhanced reliability.
| Part Number | GL4H-QDMM85SR8C | Tx Power (dBm) | -4.6~4 |
| Product | 400G QSFP-DD SR8 | Rx Power (dBm) | -7.9 |
| Max Data Rate | 425Gbps | Distance | 60m OM3 / 100m OM4 |
| Wavelength | 850nm | Connector | MPO-16/APC |
| Laser Type (TX/RX) | VCSEL/PIN | Temp | 0~70°C |
- Server interconnection within data centers
- 400G Data Center Interconnects
- Switch-to-Switch & Switch-to-Server Connections
- AI and Machine Learning Workloads
- Ultra-Fast 400G Data Rate: Delivers 400Gbps over 8 parallel 50G PAM4 lanes, ensuring high-speed data transmission.
- Short-Range Multimode Fiber Support: Optimized for up to 100 meters on OM4 MMF, ideal for intra-data center connections.
- MPO-16 Connector: Facilitates high-density fiber connections, simplifying cabling and reducing space requirements.
- Low Power Consumption: Operates efficiently with power usage typically under 8.5W, aiding in thermal management.
- Hot-Pluggable QSFP-DD Form Factor: Enables easy installation and upgrades without disrupting network operations.
- IEEE 802.3cm Compliance: Ensures interoperability across various networking equipment and platforms.
FAQ About 400G QSFP-DD SR8 Optical Transceiver
Yes. A 400G QSFP-DD SR8 optical transceiver – IEEE-compliant meets IEEE 802.3bs (400 GbE) and IEEE 802.3cd (200 GbE/400 GbE) specifications. This ensures interoperability across multimode fibers at 850 nm, supports a maximum reach of 70 m on OM3 or 100 m on OM4, and guarantees electrical and optical interface compliance for data center switching fabrics.
To secure the best deals on 400G QSFP-DD SR8 optical transceivers, compare quotes from multiple authorized distributors (e.g., FS, CTC, and Anixter). Look for volume-discount pricing tiers, end-of-quarter promotions, and refurbished or “like-new” inventory that still carries a warranty. Subscribing to vendor newsletters and joining industry purchasing groups can also surface limited-time deals.
The 400G QSFP-DD SR8 module for cloud data centers is optimized for ultra-high density and low power consumption (< 10 W per port). Its eight-lane MPO interface and duplex-capable electrical lanes enable seamless scaling in spine-leaf architectures. Key features include digital diagnostics (DDM), robust thermal management, and vendor-neutral compatibility with top-tier hyperscale switch platforms.
In GPU-heavy AI training clusters, every microsecond counts. A low-latency 400G QSFP-DD SR8 for AI training workloads minimizes serialization delay and jitter by using direct MPO ribbon fibers and advanced DSP equalization. This ensures consistent throughput for distributed deep-learning frameworks (e.g., TensorFlow, PyTorch) and helps reduce overall training time.
To install a 400G QSFP-DD SR8 optical transceiver module, first power down the port or hot-swap slot. Remove any protective caps, align the module’s guide pins with the cage rails, and gently insert it until the spring latch clicks. After installation, verify link status via your switch’s CLI or management GUI, and check DDM readings to confirm proper optics function.
A: Regular cleaning of your QSFP-DD SR8 400G optical transceiver involves these steps:
Power down the port or confirm hot-swap support.
Remove the module and protective caps.
Use a lint-free swab with high-purity isopropyl alcohol to gently clean the MPO ferrule surface.
Let it dry fully (30 seconds) before reinserting.
Inspect with a fiber-optic microscope if available, and monitor DDM optical power readings post-cleaning to ensure signal integrity.
Why Choose Fibrecross
With rigorous manufacturing standards and a commitment to compatibility, Fibrecross optical transceivers are 100% tested for performance, interoperability, and durability. Whether you’re upgrading to 400G or deploying a new cloud-native infrastructure, the Fibrecross 400GBASE-SR8 QSFP-DD optical transceiver module delivers exceptional value and proven reliability.
