Optical cables for communication and power applications include singlemode, multimode, indoor fibers, and active optical cables (AOC/DAC), each designed for specific distances, speeds, and installation environments.

Common Communication Optical Cable Models

1. Singlemode Optical Fiber Singlemode cables have a small core diameter (~8.3 microns) and support long-distance transmission, often exceeding 50 km. They are ideal for long-haul communication, data centers, enterprise networks, and fiber-to-the-home (FTTH) applications due to low signal attenuation and high bandwidth capabilities .
2. Multimode Optical Fiber Multimode cables feature larger cores (50–62.5 microns) and are suitable for shorter distances, typically 2 km to 550 meters. They are widely used in local area networks (LANs), data centers, and campus networks where high-speed transmission over moderate distances is required .
3. Indoor Optical Fiber Designed for indoor environments, these cables are lightweight, flexible, and resistant to bending. They are suitable for homes, offices, and hotels, and include variants like indoor singlemode, indoor multimode, and unshielded optical cables for easy installation .

High-Speed Active Optical Cables (AOC) and Direct Attach Cables (DAC)

• Active Optical Cables (AOC) integrate optical modules at both ends with a fiber in between, converting electrical signals to optical signals. They offer high transmission rates, long-distance capabilities, low power consumption, and EMI resistance, making them ideal for data centers and high-performance computing (HPC) environments) .
• Direct Attach Cables (DAC) can be passive or active (ACC, AEC) and are used for short-range connections between switches, servers, and storage devices. They are cost-effective and provide low-latency connections .

H3C Active Optical Cable Models

• QSFP28 to 4xSFP28 AOC: Converts a 100G QSFP28 signal into four 25G SFP28 signals, suitable for high-density interconnects.
• QSFP+ to 4xSFP+ AOC: Converts a 40G QSFP+ signal into four 10G SFP+ signals using a 12-core MPO cable, often with a splitter for customized lengths .

Key Considerations

• Transmission Distance: Singlemode for long distances, multimode for short distances.
• Installation Environment: Indoor cables for flexible, low-bend installations; outdoor cables for rugged conditions.
• Data Rate: AOC and high-speed modules support 10G, 25G, 40G, 100G, and beyond.
• Power and EMI: Optical cables reduce electromagnetic interference and power dissipation compared to copper cables . These models collectively support modern communication networks, from short-range data center interconnects to long-haul telecom networks, ensuring high reliability, low latency, and scalable bandwidth.