Hi, Robert!
Multimode fiber bandwidth and distance is measured in "MHz*km" . The typical values are below:
62.5/125 MM fiber:
160 - 300 MHz*km (850 nm)
500 - 1500 MHz*km (1300 nm)
50/125 MM fiber:
500 - 1000 MHz*km (850 nm)
500 - 1500 MHz*km (1300 nm)
For example, if your distance is 1.5 km, then the bandwidth of a 62.5 MM fiber (200 MHz*km) at 850 nm is (200 MHz*km)/(1.5 km) = 133.33 MHz
As a general rule, MM fiber is used for data rates up to 155 Mb/s for distances of less than 2 km and for data rates up to 1 Gb/s for distances of less than 500 m.
For actual distances, please refer to network applications standards.
Singlemode (SM) fiber has a very high bandwidth (up to 20 GHz, speeds up to 10 Gb/s) and can cover very large distances (up to 120 km). It is ideal for local network applications having links over 2 km.
For actual distances, please refer to network applications standards.
Best regards
Roman Kitaev, RCDD
|