Splitters only lower the optical power—not the bandwidth. Every endpoint still gets the full data stream; the light is just a little dimmer. And here's where optical networks shine (literally): even with that tiny power drop, a single fiber can carry so much data that performance. An optical splitter is a small, passive device—no power needed! —that splits one incoming light signal into multiple identical outputs. You'll often see ratios like 1:8, 1:16, 1:32, or even 1:64, which tell you how many ways the signal is divided. For example, a 1:32 splitter sends data from one. These unassuming devices enable a single optical signal to be divided into multiple paths, making them indispensable for sharing network resources efficiently—from residential FTTH (Fiber-to-the-Home) connections to large-scale telecom backbones. It allows service providers to save money. In this article, we explain the definition, working principles, types, and selection tips for optical splitters. What is an Optical Splitter? An. Light power goes in and light power coming out of the various legs is reduced in accordance to the split ratio. For every 2X increase in split ratio, power is reduced by roughly 3 dB. This process is passive, meaning it doesn't amplify or modify the signal in any way.