What is the difference between Om4 and Om3 optical fiber

What is the difference between Om4 and Om3 optical fiber? First, the transmission distance is different

1. om4 optical fiber: the maximum transmission distance of om4 optical fiber in the state of 1G, 10G, 40G/100G is 1km, 550m, and 150m respectively.

2. om3 optical fiber: the maximum transmission distance of om3 optical fiber in the state of 1G, 10G, 40G/100G is 1km, 300m, and 100m respectively.

Second, the production cost is different

1. om4 optical fiber: Om4 optical fiber has higher production costs due to its high transmission bandwidth requirements.

2. om3 optical fiber: om3 optical fiber has lower requirements for transmission bandwidth and large production demand, which makes the production cost lower.

3. Different uses

1. om4 optical fiber: om4 optical fiber is used in high-speed networks, suitable for data centers, financial centers and enterprise parks.

2. om3 optical fiber: om3 optical fiber is used in short-range networks, local area networks (LAN) and private networks.

The real difference between OM3 and OM4 multimode fiber is that OM4 has a higher modal bandwidth - 4700 MHz km compared to 2000 MHz km for OM3 fiber. This means that OM4 fiber can transmit more information within the same distance. The main difference between M3 and OM4 multimode fiber is the internal construction of the fiber core.

Both types of fiber are laser-optimized 50/125 multimode fibers, that is, both have a core diameter of 50 µm and a cladding diameter of 125 µm, which is specially clad to prevent light leakage from the core.

Both fibers use the same connector, the same termination, and the same transceiver—a vertical-cavity surface-emitting laser (VCSEL) that emits infrared light at a wavelength of 850 nm. The main difference between OM3 and OM4 multimode fiber lies in the internal structure of the fiber core.