Some customers cannot make sure which type of multimode fiber they need to choose. Below are the details of different types for your reference.
There are different categories of graded-index multimode glass fiber cable, including OM1, OM2, OM3 and OM4 cables (OM stands for optical multi-mode).
OM1 specifies 62.5-micron cable and OM2 specifies 50-micron cable. These are commonly used in premises applications for shorter reach 1Gb/s networks. But OM1 and OM2 cable are not suitable for today’s higher-speed networks.
OM3 and OM4 are both laser-optimized multimode fiber (LOMMF) and were developed to accommodate faster fiber optic networking such as 10, 40, and 100 Gbps. Both are designed for use with 850-nm VCSELS (vertical-cavity surface-emitting lasers) and have aqua sheaths.
OM3 specifies an 850-nm laser-optimized 50-micron cable with an effective modal bandwidth (EMB) of 2000 MHz/km. It can support 10-Gbps link distances up to 300 meters. OM4 specifies a high-bandwidth 850-nm laser-optimized 50-micron cable an effective modal bandwidth of 4700 MHz/km. It can support 10-Gbps link distances of 550 meters. 100 Gbps distances are 100 meters and 150 meters, respectively.