400G QSFP-DD AOC – High-Speed Optical Interconnects for the Future
In the era of exponential data growth, the need for ultra-high-speed and low-latency connectivity within and between data centers is more critical than ever. 400G QSFP-DD AOC (Active Optical Cable) is a next-generation optical interconnect solution designed to deliver superior performance in hyperscale cloud, AI, and enterprise environments.
What is 400G QSFP-DD AOC?
The 400G QSFP-DD AOC is a pre-terminated cable assembly with optical transceivers on both ends, based on the QSFP-DD (Quad Small Form Factor Pluggable Double Density) form factor. It supports 400 Gbps transmission rates over OM3/OM4 multimode fiber, making it ideal for short-reach applications up to 100 meters.
Key Specifications:
- Interface: QSFP-DD to QSFP-DD
- Data Rate: 400Gbps (8x 50G PAM4)
- Cable Length: Typically 1m to 100m
- Fiber Type: Multimode (OM3/OM4)
- Power Consumption: <10W (typical)
Application Scenarios of 400G AOC
1. Spine-Leaf Architecture in Data Centers
400G AOC cables are widely used to connect spine and leaf switches, supporting ultra-fast East-West traffic with minimal latency.
2. GPU Clusters and AI Supercomputing
In high-performance computing (HPC) and AI training setups (e.g., with NVIDIA H100 GPUs), 400G AOCs provide low-latency and high-bandwidth interconnects between compute nodes.
3. Short-Distance Inter-Rack Connections
For connections within the same row or across adjacent racks, 400G AOC reduces deployment complexity, cost, and EMI compared to direct attach copper cables.
Advantages of Using 400G QSFP-DD AOC
- High Bandwidth & Low Latency: Supports 400Gbps with minimal latency, ideal for real-time data processing.
- Plug-and-Play Deployment: No need for transceiver modules or patch cords — lowers installation time and maintenance complexity.
- Lightweight & Flexible: Easier cable management compared to passive copper solutions.
- Cost-Effective for Short Reach: Provides an affordable high-speed solution within 100m range, especially for hyperscale deployments.
- Energy Efficient: Consumes less power than individual optical transceivers paired with patch cords.
Conclusion
As networks evolve to meet the demands of AI, machine learning, and high-throughput cloud applications, 400G QSFP-DD AOC stands out as a crucial solution for short-reach, high-performance interconnects in data centers.
For data center architects looking to optimize cost, speed, and scalability, deploying 400G AOC is a forward-thinking strategy.
About Optech
Optech Technology Co. Ltd was founded in 2001 in Taipei, Taiwan. The company was created with a sole purpose, to provide a wide and high quality portfolio of optical products to a very demanding and fast evolving market.
To respond to the permanent increase of IP traffic, Optech portfolio is constantly growing. Since the beginning, the company has always been up to date with the latest innovations on the market. Today, we are proud to deliver a large selection of 25G SFP28, 40G QSFP+, 100G QSFP28, 200G QSFP56, 400G QSFP-DD, 800G QSFP-DD and OSFP optical transceivers and cables.
Optech has a large portfolio of products which include optical transceivers, direct attach cables, active optical cables, loopback transceivers, media converters and fiber patch cords.
Through its large selection of optical products, that have a range of data speed from 155 Mbps to 800 Gbps and reach distances up to 120km, Optech products are suitable for various industries such as telecom, data centers as well as public and private networks.
| Optech Part Numebr | Length (m) |
| OPQSDD-F-03-AKT | 3m |
| OPQSDD-F-05-AKT | 5m |
| OPQSDD-F-10-AKT | 10m |
| OPQSDD-F-20-AKT | 20m |
| OPQSDD-F-30-AKT | 30m |
| OPQSDD-F-A0-AKT | 100m |
To check compatibility brands click here.
For additional information about our 400G QSFP-DD AOC, or price inquiry, please contact us at sales@optech.com.tw
