OM2 optical fiber is typically used for supporting 1G and 100M Ethernet applications, and it is not recommended for supporting 10G Ethernet. For 10G applications, it is recommended to use OM3 or OM4 optical fiber, which have higher bandwidth and are designed to support higher data transmission speeds.

First, OM1, OM2, OM3 and OM4 fiber parameters and specifications comparison

1, OM1 refers to 850/1300nm full injection bandwidth in 200/500MHz.km above the 50um or 62.5um core diameter multimode fiber;

2, OM2 refers to 850/1300nm full injection bandwidth in 500/500MHz.km above 50um or 62.5um core diameter multimode fiber;

3, OM3 is 850nm laser-optimized 50um core diameter multimode fiber, and the fiber transmission distance can reach 300m in 10Gb/s Ethernet using 850nm VCSEL;

4, OM4 is the upgraded version of OM3 multimode fiber, the fiber transmission distance can reach 550m.

Type Fiber Diameter (μm) Fiber Type 1 Gigabit Ethernet 1000BASE-SX1 Gigabit Ethernet 1000BASE-LX10Gbps Ethernet 10GBASE40Gbps Ethernet 40GBASE SR4100Gbps Ethernet 100GBASE SR4

• OM162.5/125 Multimode 275m550m33mNot supportedNot supported

• OM250/125 multimode 550m550m82mNot supportedNot supported

• OM3(laser optimized)50/125 multimode550m550m300m100m(SR4)100m(SR4)

• OM4(Laser Optimized)50/125Multimode550m550m400m150m(SR4)150m(SR4)

• Singlemode9/125Singlemode5km at 1310nm5km at 1310nm10km at 1310nmN/AN/A

Second, OM1, OM2, OM3 and OM4 fiber design comparison

1, the traditional OM1 and OM2 multimode fiber from the standard and design of the LED (Light Emitting Diode light-emitting diode) mode as the basic light source, while OM3 and OM4 are optimized on the basis of OM2, so that it is also suitable for the light source for the transmission of LD (Laser Diode);

2、Compared with OM1 and OM2, OM3 has higher transmission rate and bandwidth, so it is called optimized multimode fiber or 10 Gigabit multimode fiber;

OM4 is optimized on the basis of OM3 and has better performance.

Third, OM1, OM2, OM3 and OM4 fiber functions and features comparison

1, OM1: core diameter and numerical aperture is larger, with a strong ability to collect light and anti-bending characteristics;

2, OM2: core diameter and numerical aperture are smaller, effectively reducing the mode dispersion of the multimode fiber, so that the bandwidth increases significantly, the production cost is also reduced by 1/3;

3, OM3: the use of flame-retardant jacket, which can prevent the spread of flames, prevent the emission of smoke, acid gases and poisonous gases, etc., and to meet the needs of the 10 gb / s transmission rate;

4, OM4: developed for VSCEL laser transmission, the effective bandwidth is more than double than OM3.