The optical fiber output from the splitter can

The optical fiber output from an optical splitter is a portion of the input optical signal distributed to multiple output fibers according to the splitter's design and splitting ratio.

How Optical Splitters Work

An optical splitter is a passive device that divides a single incoming optical signal into two or more outgoing signals without requiring electrical power . The input signal enters the splitter through the input fiber, and inside the device, it is distributed among the output fibers either evenly or according to a specified ratio . The output fibers carry the split signals to multiple endpoints, such as Optical Network Units (ONUs) in FTTH networks .

Splitting Ratios and Output Power

The splitting ratio determines how the input optical power is divided among the outputs. Common configurations include 1:2, 1:4, 1:8, 1:16, 1:32, and 1:64 . For example, in a 1:4 splitter, the input signal is divided into four output fibers, each receiving approximately one-fourth of the input power. The actual output power is slightly lower than the ideal fraction due to insertion loss, which is the signal power lost during splitting . PLC splitters provide uniform output power across all fibers, while FBT splitters may have slight variations depending on the design .

Types of Splitters

• PLC (Planar Lightwave Circuit) Splitters: Use photolithographic techniques to create waveguides on a silica substrate, offering precise and even splitting with minimal loss, suitable for large-scale networks .
• FBT (Fused Biconical Taper) Splitters: Made by fusing and stretching fibers, allowing customizable splitting ratios, but may have wavelength-dependent losses and less uniformity .

Applications

Optical splitters are widely used in passive optical networks (PONs), including EPON, GPON, and FTTH, to distribute a single optical signal from the central office to multiple subscribers . They enable efficient sharing of fiber infrastructure, reducing the need for separate fibers to each user. In summary, the optical fiber output from a splitter is a fraction of the input signal, determined by the splitter's ratio and type, and is transmitted to multiple endpoints while maintaining network efficiency and signal quality .