Which option correctly matches a blue UPC single-mode connector with its purpose?

Which option correctly matches a blue UPC single-mode connector with its purpose?

• A. Blue UPC single-mode connector reduces Fresnel reflection
• B. Blue UPC single-mode connector increases backscatter
• C. Blue UPC single-mode connector reduces dispersion
• D. Blue UPC single-mode connector causes more attenuation

Answer: (A)

A blue UPC single-mode connector is designed to minimize light reflected back toward the source by providing an ultra-polished end-face that lowers Fresnel reflections at the fiber end. This improves return loss, which is the key purpose of UPC connectors. The color coding helps identify this style for single-mode use. The other statements don’t fit because backscatter is not increased by using UPC, and dispersion or attenuation are not primarily controlled by the connector’s polish or color; dispersion is a fiber property, and attenuation is dominated by overall losses, not the intended function of this connector.

A blue UPC single-mode connector is designed to minimize light reflected back toward the source by providing an ultra-polished end-face that lowers Fresnel reflections at the fiber end. This improves return loss, which is the key purpose of UPC connectors. The color coding helps identify this style for single-mode use. The other statements don’t fit because backscatter is not increased by using UPC, and dispersion or attenuation are not primarily controlled by the connector’s polish or color; dispersion is a fiber property, and attenuation is dominated by overall losses, not the intended function of this connector.