Fiber Optic Splitter Features
Single Mode, multimode, and PM fiber types
Multiple port configurations
Various splitting ratios, 50:50 to 1:99
Tube type or Box type
PC, UPC, and APC fiber optic connectors
Available with FC, SC, ST, LC, and MU terminations

Fiber Optic Splitter Introduction
fiber optic splitter is a device that split the fiber optic light into several parts by a certain ratio. For example, when a beam of fiber optic light transmitted from a 1X4 equal ratio splitter, it will be divided into 4-fiber optic light by equal ratio that is each beam is 25% of the original one. fiber optic splitter is different from WDM. WDM can divide the different wavelength fiber optic light into different channels. fiber optic splitter divide the light power and send it to different channels.

Single window Fiber Optic Splitter and dual window Fiber Optic Splitters
Here the window refers to the working wavelength. Single window fiber optic splitter is with one working wavelength, dual window fiber optic splitter is with two working wavelength. For multimode fiber, the term means that the fiber is optimized for 850 nm and 1310 nm operation. For single-mode fibers, the term means that the fiber is optimized for 1310 nm and 1550 nm operation. For single window fiber optic splitter, its working wavelength usually is one of the above said wavelength.