An optical power meter is an indispensable core testing instrument in fiber optic communication systems, optical network deployment, and maintenance. Its primary function is to accurately measure the power of optical signals, providing crucial data support for performance evaluation, fault diagnosis, and equipment debugging of fiber optic links. As a fundamental tool for "health monitoring" of optical transmission systems, the parameters of an optical power meter directly determine its measurement accuracy, applicable scenarios, and reliability. The following comprehensively analyzes the parameter characteristics of optical power meters from dimensions such as core parameters, extended parameters, environmental adaptability, and functional features, helping to understand their selection logic and application value in different scenarios.