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Fused fiber optic splitters are optical devices that connect three or more fiber ends, dividing one input between two or more outputs, or combining two or more inputs into one output. The cable type accepted by fiber optic splitters can be single mode or multi mode. Choices for splitter type include single window, dual window, or wide band. Single window optic splitter is designed for a single wavelength with a narrow wavelength window. Dual wavelength optical splitters are designed for two wavelengths with a wide wavelength window for each. Wide band optical splitter is designed for a single wavelength with a wider wavelength window. Wavelength choices for fiber optic splitters include 850nm, 1310nm and 1550nm.

Single-mode PLC splitter (Planar Lightwave Circuit) is developed using silica glass waveguide circuits and aligned fiber optic pigtails, integrated inside a miniature package. The PLC splitters provide low-cost solution for optical signal distribution in PON network, with small form factor and superb reliability. These PLC devices have high quality performance, such as low insertion loss, low PDL, high return loss and excellent uniformity over a wide wavelength range from 1260 nm to 1620 nm, and work in temperature from -40ºC to +85ºC.