In depends on if you are running half or full-duplex connection. Half-duplex can work with as few as 1 strand, while full-duplex requires at least 2 strands available.
Multimode
Uses a dual ring of single-mode or multimode fiber-optic.
multimode fiber network + Guide to networks pg 106-108
Multimode fiber
Singlemode fiber has a lower power loss characteristic than multimode fiber, which means light can travel longer distances through it than it can through multimode fiber. Not surprising, the optics required to drive singlemode fiber are more expensive. When to use each: Both singlemode and modern multimode fiber can handle 10G speeds. The most important thing to consider is the distance requirement. Within a data center, it's typical to use multimode which can get you 300-400 meters. If you have very long runs or are connecting over longer distance, single mode can get you 10km, 40km, 80km, and even farther - you just need to use the appropriate optic for the distance required, and again, the prices go up accordingly. Compatibility issues: They are not compatible. You cannot mix multimode and singlemode fiber between two endpoints. The optics are not compatible either.
850 and 1300nm
850nm laser-optimized 50/125-micron multimode fiber
Multimode fiber optic cable at 850nm
To connect a server 1 km away without using a repeater, you would typically use fiber optic cable, specifically multimode or single-mode fiber depending on the required bandwidth and distance. Single-mode fiber is ideal for long distances and high-speed data transmission, while multimode fiber is suitable for shorter distances but may have limitations over 1 km. Additionally, ensure that both ends have the appropriate transceivers to facilitate the connection.
"MIC" stands for Mode-Field Diameter in Fiber Optics. It refers to the diameter of the optical mode in a fiber, which affects the propagation of light signals within the fiber. A smaller MIC typically results in better signal quality and lower dispersion.
The maximum distance for multimode fiber typically ranges from about 300 meters to 2 kilometers, depending on the type of multimode fiber and the data transmission rate. For example, OM3 multimode fiber can support 10 Gbps over distances up to 300 meters, whereas OM4 can extend this to approximately 400 meters. At higher speeds, like 40 Gbps or 100 Gbps, the effective distance is usually shorter. Ultimately, the specific application and equipment used will determine the actual distance achievable.
Multimode fiber (MMF.