What tool is commonly used to measure light loss in fiber optic cables?

The Optical Power Meter is designed specifically for measuring the amount of optical power transmitted through fiber optic cables. This tool helps technicians determine the power loss over a fiber link, which is crucial for ensuring the performance and reliability of the fiber optic network. It measures the power in decibels (dB), allowing for accurate assessments of connector loss, splice loss, and overall system performance.

In contrast, a Signal Generator is used primarily to generate signals for testing purposes rather than measuring optical power. A Network Analyzer is employed to analyze the performance of networks, including parameters like return loss and insertion loss, but is not specifically suited for direct light loss measurement in fiber optics. A Voltage Meter is used for electrical circuits and does not pertain to fiber optics, as it measures electrical voltage rather than light power. Each of these tools serves distinct purposes, but for measuring light loss specifically in fiber optic cables, the Optical Power Meter is the standard instrument used in the industry.