1. Differences between OM1, OM2, OM3, and OM4 fiber optic jumpers
1. Different parameters
(1) OM1 refers to a 50um or 62.5um core diameter multimode fiber with a full injection bandwidth of 850/1300nm above 200/500MHz.km;
(2) OM2 refers to the 50um or 62.5um core diameter multimode fiber with a full injection bandwidth of 850/1300nm and above 500/500MHz.km;
(3) OM3 is a 50um core diameter multimode fiber optimized by 850nm laser. In 10Gb/s Ethernet using 850nm VCSEL, the fiber transmission distance can reach 300m;
(4) OM4 is an upgraded version of multimode optical OM3 fiber, and the transmission distance of the fiber can reach 550m.
2. Different uses
M1 and OM2 have been widely deployed in buildings for many years, supporting Ethernet transmission with a maximum of 1GB;
OM3 and OM4 optical cables are usually used in the wiring environment of the data center, supporting the transmission of 10G or even 40/100G high-speed Ethernet.
3. Different optical fiber designs
OM1 and OM2 use LED (light emitting diode) as the basic light source for transmission, while OM3 and OM4 are suitable for both LED and LD (laser diode) light source transmission.
4. Differences in transmission speed and bandwidth
The transmission speed and bandwidth of OM fiber jumpers increase step by step, OM1<OM2<OM3<OM4
5. Different functions and features
(1) OM1: Large core diameter and numerical aperture, with strong light-gathering ability and bending resistance;
(2) OM2: The core diameter and numerical aperture are relatively small, which effectively reduces the modal dispersion of multimode fiber, significantly increases the bandwidth, and reduces the production cost by 1/3;
(3) OM3: The flame-retardant outer skin can prevent the spread of flames, prevent the emission of smoke, acid gas and poisonous gas, etc., and meet the needs of 10 Gb/s transmission rate;
(4) OM4: Developed for VSCEL laser transmission, its effective bandwidth is more than double that of OM3.
1. Select the correct connector. The connectors of fiber optic jumpers are LC / SC / ST / FC / MPO / MTP. If the interfaces at both ends of the equipment are the same, we can use LC-LC/SC-SC/MPO-MPO. If the interfaces at both ends of the equipment are different, we can use The connection mode of LC-SC/LC-ST/LC-FC.
2. Choose single-mode or multi-mode. Single-mode is mainly used for long-distance transportation, and multi-mode is mainly used for short-distance transportation. Generally, the color of single-mode jumpers is yellow, and the color of multi-mode jumpers is orange, lake blue, and purple.
3.Choose single fiber or dual fiber. The single-fiber jumper has only one line, which is connected with a bidirectional (BIDI) optical module, and the dual-fiber is two jumpers side by side, which are connected with an ordinary optical module.
