Parameter comparison
1. Om1 refers to a full injection bandwidth of 200 / 500 at 850 / 1300nm MHz.km 50um or 62.5um core diameter multimode fiber;
2. Om2 refers to 850 / 1300nm full injection bandwidth of 500 / 500 MHz.km 50um or 62.5um core diameter multimode fiber;
3. OM3 is a 50um core diameter multimode fiber optimized by 850nm laser. In 10Gb / s Ethernet with 850nm VCSEL, the optical fiber transmission distance can reach 300m;
4. OM4 is an upgraded version of OM3 multimode fiber, and the optical fiber transmission distance can reach 550m
Comparison of functions and features
1. Om1: with larger core diameter and numerical aperture, it has strong light collection ability and bending resistance;
2. Om2: the core diameter and numerical aperture are relatively small, which effectively reduces the mode dispersion of multimode fiber, significantly increases the bandwidth and reduces the production cost by 1 / 3;
3. OM3: flame retardant sheath can prevent the spread of flame, smoke, acid gas and toxic gas, and meet the needs of 10 GB / s transmission rate;
4. OM4: developed for vscel laser transmission, the effective bandwidth is more than twice that of OM3.
Application Comparison
1. Om1 and om2 have been widely deployed in buildings for many years, supporting the maximum value of 1GB Ethernet transmission;
2. OM3 and OM4 optical cables are usually used in the data center cabling environment, supporting 10g or even 40 / 100g high-speed Ethernet transmission.
OM3 fiber is designed to work with VCSEL to meet the requirements of 10 Gigabit Ethernet applications. There are many types of OM3 optical fiber, including indoor type, indoor / outdoor versatility, etc. the number of optical fiber cores ranges from 4 to 48. In addition, it also supports all applications based on the old multimode 50 / 125 fiber, including LED light source and laser light source.
OM4 fiber can make full use of the current multimode fiber technology and reduce the overall cost of the current system; when the system needs to be upgraded to a higher speed system, such as 40g and 100g, OM4 can still be used and will save more costs. In a word, when the transmission rate is greater than 1GB / s, using multimode fiber is a good system choice.
