What is the core diameter of multi-mode fiber usually?

The core diameter of multi-mode fiber is typically around 50 or 62.5 microns, which allows multiple modes of light to propagate through the fiber simultaneously. This larger core size is essential for multi-mode applications because it permits the transmission of more than one light pathway or mode.

This design makes multi-mode fiber suitable for short-distance communication, where high data rates are needed over a limited range. The values of 50 and 62.5 microns reflect the industry standards for multi-mode fibers, aligning them with specific applications in networks and data transmission.

The other options do not represent standard core diameters for multi-mode fiber. For instance, core sizes around 8 to 10 microns and those ranging from 1 to 5 microns are more characteristic of single-mode fibers, which are designed for long-distance communication with a single light path. The suggestion of a core diameter around 100 microns, while it may seem reasonable, exceeds typical specifications and could lead to challenges in data integrity and signal loss in practical applications.