Comparing Active Optical Connectors (AOC) and Structured Cabling Solutions

In modern data centers and high-performance computing environments, reliable and efficient data transmission is paramount. Two popular solutions for optical connectivity are Active Optical Connectors (AOCs) and structured cabling systems. Both approaches cater to specific use cases, and their selection depends on factors such as performance requirements, deployment flexibility, and cost considerations. This article compares AOCs and structured cabling, highlighting their respective advantages and disadvantages.

 

Active Optical Connectors (AOCs)

Active Optical Connectors (AOCs) are fiber optic cables that are usually multimode fiber optic cables integrated with transceivers on both ends, combining optical transceivers and cabling into a single solution. It is a similar solution to the Diract Attach Cables (DAC) which is based on copper cables, suitable for short range connectivity for switches, servers, and storage systems within a rack.

One of the key advantages of AOCs is their ease of deployment. These solutions are ready to use, eliminating the need for separate transceivers and additional termination work, thereby reducing installation complexity and minimizing the potential for user errors.

As the transceivers are integrated to the fiber cable, the user does not need to manage optical connectors which reduces network attenuation and removes the risk of connector contamination that may impact network performance. They also feature a compact design, being lightweight and space-saving, which simplifies cable management in dense environments. It is also a cheaper solution compared to the conventional connector and transceiver solution. In addition, the speed of deployment is also increased as the operator does not need to perform optical connector end-face testing and cleaning.

Because the AOC module is integrated with the cable, any malfunction requires the replacement of the entire unit, presenting a significant disadvantage when compared to the separate optical module and jumper setup. Furthermore, AOCs necessitate the verification of transmission distance prior to dispatch, complicating any product adjustments post-manufacturing. In addition, the pre-terminated design makes it only suited for short to medium distance transmission, usually up to 100 meters.

Structured Cabling Solution

Structured cabling solutions, on the other hand, use high-fiber-count cables that connect modular patch panels, typically in a backbone configuration. These systems provide flexibility and scalability for large-scale networks.

One major advantage of structured cabling is its scalability and flexibility. The modular nature of these systems allows for easy reconfiguration to meet growing network demands, and the use of patch panels and high fiber count connectors such as the MPO and SN-MT connectors simplifies adding or rearranging connections. If the connector to the new transceiver uses a different type of connector, the only component that needs to be replaced is the patch cord from the patch panel to the transceiver without touching the structured cabling in the backbone.

Structured cabling is ideal for long-distance connectivity, supporting links over several kilometers with minimal signal loss. The ability to order cables in custom lengths reduces slack and optimizes installation. Additionally, structured cabling is durable and repairable, as individual components such as cables or connectors can be replaced or repaired without discarding the entire assembly.

However, structured cabling solutions come with their own set of disadvantages. The initial costs can be high due to the need for additional hardware like patch panels, transceivers, and connectors. Installation can be complex and requires skilled technicians for termination and testing. High-density structured cabling may also consume more space in pathways and racks compared to AOCs.

The structured cabling system introduces at least 4 additional connectors which will increase optical attenuation and reflectance as well as become potential points of failure. SENKO has been investing in continuous quality improvement and refining manufacturing processes to improve network resilience and reliability.

Conclusión

The choice between AOCs and structured cabling depends on the specific requirements of the deployment. AOCs are ideal for short to medium-range connections, high-performance computing environments where simplicity and performance are key, and applications requiring lightweight and compact cabling solutions. In contrast, structured cabling is better suited for large-scale data centers requiring long-distance connections and scalability, environments with frequent reconfiguration needs, and scenarios where modularity and repairability are important.

Both Active Optical Connectors and structured cabling systems offer distinct advantages and are tailored for different scenarios. AOCs excel in simplicity and high-speed performance for shorter distances, while structured cabling shines in scalability and long-distance applications. Understanding the unique requirements of your network will help determine the most appropriate solution for your optical connectivity needs.