Since the introduction of Gigabit Ethernet, we've seen premises cabling, designed to carry gigabit and 10 gigabit (and faster) traffic using 850 nm VCSEL (laser) transmitters, moving toward standardization on 50/125 laser-optimized fiber (now often called OM3/OM4 fiber for it's international standards designation) often with LC connectors to match the manufacturers' standard for VCSEL transceivers. OM3 cabling even has it's own color, aqua, specified in TIA-598.
If you are planning, designing, installing or using high speed premises fiber optic networks, you should probably be recommending and using OM3 or OM4 fiber and LC connectors. Within the industry, this is becoming a "de facto" standard. One big advantage of using a full OM3/OM4 cabling standard is that the cabling is easily identifiable by the aqua color and when LC connectors are used instead of ST or SC connectors, it cannot be interconnected with legacy cabling, especially 62.5/125 fiber which causes large mismatched fiber losses.
Using this nomenclature does not specify a type of cable. Unlike Category-rated UTP, fiber optic cable is available in several types (zipcord, distribution or breakout) to allow choosing a cable for the installation, saving space, weight, and, since numerous links can be combined into one multifiber cable, installation costs.
50/125 microns (OM3)
Attenuation @850/1300 nm, Typical (TIA*): 3/1 dB/km (3.5/1.5 dB/km)
Bandwidth @850/1300 nm: 2000/500 MHz-km Optimized for 850 nm VCSELs
50/125 microns (OM4)Attenuation @850/1300 nm, Typical (TIA*): 3/1 dB/km (3.5/1.5 dB/km)
Bandwidth @850/1300 nm : 3600/500 MHz-km Optimized for 850 nm VCSELs, higher speed for 10 GB/s and above