What is the standardized outside diameter of the cladding in single-mode fiber?

The standardized outside diameter of the cladding in single-mode fiber is 125 micrometers (um). This measurement is critical as it is part of the structure that enables single-mode fibers to function effectively. The cladding works alongside the core to reflect light back into the core, thus facilitating the transmission of signals over long distances with minimal loss.

In single-mode fiber, the core diameter is typically around 9 micrometers, and the cladding diameter remains consistent at 125 micrometers. This standardization is essential for compatibility in installations and ensures one can achieve the expected performance and quality when deploying single-mode fiber optic cables. The uniformity in size allows for standardized connectors and splicing processes, thereby simplifying both manufacturing and installation practices in the field.

Other choices do not accurately represent the standardized cladding diameter for single-mode fiber, leading to potential confusion and impediments in ensuring proper technical specifications when dealing with fiber optics.