What is the purpose of an optical return loss test set?

The purpose of an optical return loss test set is to measure the amount of reflected energy from fiber. This test is crucial in fiber optic communication as it helps evaluate the quality of the fiber installation and identify issues such as faults, connectors, and splices that may cause signal reflection. High levels of reflected energy can indicate problems that might lead to reduced performance or interruptions in the network. By using an optical return loss test set, technicians can ensure that the fiber optic network operates efficiently and maintains signal integrity.

Understanding this measurement is vital for maintaining optimal performance in optical systems, making option B the correct choice.