1.2 Uniform division of light Function: distributes the signal from the fiber optic network evenly across each line, ensuring uniform light distribution on all outputs. Benefit: maintains consistent performance across channels, reduces variation between outputs, and simplifies downstream calibration. 2.1 Operator quality standards, strong stability Function: designed to meet operator quality standards to provide strong, stable performance. Benefit: reliable operation over time, lower risk of downtime, predictable behavior in typical use. Use scenarios Telecommunications distribution cabinet: evenly split optical signals to multiple subscriber lines to maintain uniform power on each branch. Data center or enterprise network: distribute backbone fiber to several switches or racks with balanced optical power for consistent link quality. Optical testing or lab environment: supply uniform illumination across multiple test channels for repeatable experiments and measurements.