What test is commonly used to ensure no breaks exist in a fiber optic cable?

The optical time-domain reflectometer (OTDR) test is commonly used to ensure there are no breaks in a fiber optic cable. This test is particularly effective for fiber optic systems because it can analyze the cable's loss at various points along its length and pinpoint any breaks or faults. An OTDR sends light pulses down the fiber and measures the amount of light that is reflected back, allowing technicians to visualize and assess the integrity of the fiber infrastructure.

Using an OTDR provides not only a distinct identification of breaks but also visual representations of various characteristics along the fiber run, such as splice loss and connector loss. This comprehensive analysis is crucial for maintenance and troubleshooting within fiber optic networks, making it a preferred method for verifying the continuity and performance of fiber installations.