In real-world deployments, QSFP+ LC transceivers are typically selected for 2km, 10km, 40km, and even ultra-long 80km links, depending on the optical standard used (FR4, LR4, ER4, or ZR4). Multimode fiber distance is shorter than singlemode fiber reach. Impacts cost, power, and distance. Transmitter. VR (Very Short Range): Transmission distance usually 0~100 meters, using multimode fiber for short data center connections. Product Knowledge: Choosing the Right One: 🔎 Match fiber type (MMF or SMF) 🔎 Consider link budget and optical power 🔎 Watch for connector. 1) 850nm (MM, multi-mode, low cost but short transmission distance, generally only 500m); 2) 1310nm (SM, single mode, large loss but small dispersion during transmission, generally used for transmission within 40km); 3) 1550nm (SM, single mode, small loss but large dispersion during transmission. The LR4 QSFP+ module provides a 40 Gb optical connection using LC optical connectors. This optical module integrates four data lanes on separate CWDM wavelengths in each direction for 40 Gbps aggregate bandwidth. 3125 Gbps up to 10 km using single-mode fiber.
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