Active Optical Cables (AOC) have emerged as an efficient replacement for copper cables in data centers and high-performance computing, offering high-speed, reliability, and low power consumption. AOC cables consist of fiber optic connectors and cables, allowing for electrical-to-optical conversion, and come in various types for different data communication applications. Their features make them suitable for connecting switches and storage systems over longer distances while reducing electromagnetic interference and energy consumption.

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As data rates rise and data center grows in size, copper cable is getting stretched to its limits.
However, active optical cable (AOC) has emerged to replace copper cable in data centers and
high-performance computing (HPC) applications. It provides high-speed, high reliability, high flexibility,
and low power consumption. This article will provide some knowledge of AOC cable.
What is an Active Optical Cable?
Active optical cable (AOC) is an optical fiber jumper cable terminated with optical transceivers on
both ends. It uses electrical-to-optical conversion on the cable ends to improve the speed and
distance performance of the cable without sacrificing compatibility with standard electrical
interfaces.

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Active Optical Cable Structure
AOC cable consists of the fiber optic connector and fiber cable. The connection between fiber
cable and fiber optic connectors is not separable. If the fiber optic connector or fiber cable needs
to be changed, they should be removed together. The electrical and optical signal conversion can
be achieved right through each end of the optical fiber.
Active Optical Cable Types
There are several varieties of AOC cable available on the market , including 10G SFP+ AOC, 25G

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SFP28 AOC,40G QSFP+ AOC, 56G QSFP+ AOC, 40G QSFP+ to 4x SFP+ breakout AOC, 40G QSFP+
to 8x LC breakout AOC, 100G QSFP28 AOC, 100G QSFP28 to 4x SFP28 breakout AOC and 120G
CXP AOC, etc. These AOC cables are commonly used for short-range multi-lane data
communication and interconnect applications between two devices, such as rack-to-rack,
shelf-to-shelf interconnect, storage, hubs, switches, routers, servers, etc.
Features and Benefits
AOC cable provides low power consumption, high density, high speed, high reliability, high
security, small size, strong heat dissipation, low electromagnetic interference, long transmission
distance, low energy consumption, low latency, lightweight, and ease of installation.
Application Scenarios
AOC Cable is used to connect top-of-row (ToR) switches to end-of-row aggregation switches, and
to connect the ToR switch with storage subsystems at reaches greater than direct attach copper
(DAC) limits of 3-7 meters. The following three scenarios show the specific applications.
Scenario 1: AOC cable is used to connect two switches directly.

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Scenario 2: The breakout AOC cable provides a highly cost-effective way to connect within racks
and across adjacent racks. The following figure shows 40GbE QSFP+ to 4 x SFP+ AOC cable
connecting to a 40G QSFP+ port switch on one end, and to four 10G SFP+ port switches on the
other end.
Scenario 3: For the long-haul transmission between the two switches, a suitable solution is
recommended to use single-mode patch cable, OEO converters, and AOC cables, which can
provide seamless integration of different fiber types by converting multi-mode fiber to
single-mode fiber.

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Conclusion
AOC cable achieves high data rates over long reaches interconnection, which is the best solution
for data centers and high-performance computing applications. Sun Telecom specializes in
providing one-stop total fiber optic solutions for all fiber optic application industries worldwide.
Contact us if any needs.