QSFP Active Optical Devices (AOCs) are high-speed, plug-and-play optical interconnects designed for data center and high-performance computing applications, offering long reach, low power, and high-density connectivity.

Overview

Active Optical Cables (AOCs) in the QSFP form factor combine optical fiber with integrated transceivers to transmit high-speed data over longer distances than traditional copper cables. They are widely used in data centers, enterprise networks, and high-performance computing environments to support 40G, 100G, and higher Ethernet links . AOCs are preferred for their low power consumption, reduced signal loss, and improved flexibility compared to passive copper or active copper solutions .

Key Features

• High Data Rates: QSFP AOCs support speeds from 40 Gbps (QSFP+) up to 400 Gbps (QSFP112G) using multiple channels in a single pluggable interface .
• Plug-and-Play: Hot-swappable design allows easy installation without network downtime .
• Long Reach: Typical link lengths range from 20 meters to 100 meters over multimode fiber, depending on the QSFP type and fiber grade (OM3/OM4), .
• High Density: Compact QSFP form factor enables high port density in switches and servers, supporting multiple channels in a single module .
• Standards Compliance: Compatible with IEEE 802.3 standards for 40GBASE and 100GBASE Ethernet, ensuring interoperability with other compliant devices .

Applications

• Data Centers: High-bandwidth interconnects between servers, storage, and switches.
• High-Performance Computing (HPC): Low-latency, high-speed links for compute clusters.
• Enterprise Core and Distribution Networks: Reliable optical links for backbone connectivity.
• Service Providers: Scalable solutions for metro and long-haul optical networks.

Types and Variants

• QSFP28: Supports 100G Ethernet, often used with 12-fiber MPO connectors for parallel optics .
• QSFP56: Supports 200G Ethernet, providing higher throughput per port.
• QSFP112G: Supports up to 400G aggregate data rates using PAM4 modulation, suitable for next-generation data centers .
• 40G QSFP BiDi: Uses duplex LC connectors to upgrade existing 10G duplex MMF infrastructure to 40G without replacing fiber .

Advantages of Active Optical Devices

• Extended Reach: Optical transmission allows longer distances than copper cables.
• Reduced Power Consumption: Lower energy usage compared to active copper solutions.
• Improved Signal Integrity: Less susceptibility to electromagnetic interference (EMI).
• Flexibility: Lightweight and bendable cables simplify routing in dense racks. QSFP Active Optical Devices are essential for modern high-speed networks, providing scalable, reliable, and energy-efficient optical connectivity for demanding applications in data centers and HPC environments .