Optical splitters are wideband, passive and very efficient signal splitters that split an incoming signal on optical fiber into two or more output signals on separate fibers. They function equally well at any bit rate. Models are available for signal distribution, with multiple equal-energy outputs, or for monitoring with a single low-power tap off the main signal. The splitters are packaged in modular form, with all modules the same size, and configured to install in a convenient 1 RU tray that holds up to ten modules.