What function does an optical power meter serve in testing a fiber-optic plant?

An optical power meter is a vital instrument in testing a fiber-optic plant because it measures the light signal strength at any connection point within the fiber optic system. This measurement is crucial for assessing the performance and integrity of the fiber link. By determining the power levels of the light signal, technicians can identify any issues such as excessive loss due to poor connections, bends, or faults in the fiber. This functionality allows for troubleshooting and ensures that the optical network operates within the desired parameters, ultimately leading to reliable communication over the fiber optic infrastructure. The ability to measure light signal strength helps in maintaining optimal signal quality, which is essential for effective data transmission.