What is the core diameter of OM2 and OM3 multimode fiber?

What is the core diameter of OM2 and OM3 multimode fiber?

• A. 50 microns
• B. 62.5 microns
• C. 62.5 mm
• D. 9 mm

Answer: (A)

In multimode fiber, the core diameter is the key dimension that determines how many light modes can propagate. For OM2 and OM3, the standard core diameter is 50 micrometers (with a 125 micrometer cladding). This size is what defines their typical performance and compatibility. The 62.5 micrometer option comes from older OM1 fiber, while the millimeter-scale values are not used for fiber cores. So 50 micrometers is the correct core diameter.

In multimode fiber, the core diameter is the key dimension that determines how many light modes can propagate. For OM2 and OM3, the standard core diameter is 50 micrometers (with a 125 micrometer cladding). This size is what defines their typical performance and compatibility. The 62.5 micrometer option comes from older OM1 fiber, while the millimeter-scale values are not used for fiber cores. So 50 micrometers is the correct core diameter.