Brief introduction of fiber optic splitter

In today’s optical network topologies, the advent of fiber optic splitters is important to help users maximize the performance of optical network circuits. A fiber splitter, or sometimes a beam splitter, is a passive optical component that splits the incident beam into two or more beams, and vice versa. The device contains multiple inputs and outputs. Whenever it is desired to divide the optical transmissions in the network, a fiber optic splitter can be implemented to facilitate network interconnection.

How does the fiber optic splitter work?

As for the working principle of the fiber splitter, it can generally be described in the following manner. When an optical signal is transmitted in a single-mode fiber, the light energy cannot be completely concentrated in the fiber core. A small amount of energy will propagate through the fiber cladding. and also

That is, if the two fibers are close enough to each other, the transmitted light in the fiber can enter the other fiber. Therefore, the optical signal redistribution technique can be implemented in a plurality of optical fibers. This is how the fiber splitter is generated.

Classification of fiber separators

Currently, there are two types of fiber optic splitters. One is called a PLC (Plane Lightwave Circuit) separator, and the other is called an FBT (Fused Double Cone) separator.

1) The PLC splitter uses an optical splitter chip to split the input signal into multiple outputs. An optical splitter chip can implement up to 64 endpoints. PLC splitters are typically used for larger applications. PLC splitter loss

Not sensitive to wavelengths, meeting the needs of multi-wavelength transmission. The PLC distributor is compact and small in size, which greatly saves installation space.

2) The FBT separator is fused to a heat source similar to a one-to-one fusion joint. The fibers are stretched under the heated zone to form a double cone. Due to the commonly used materials, the FBT separator has a lower cost and an adjustable split ratio. But the loss is very sensitive to wavelength. The device should be selected based on the wavelength. And it does not provide uniform spectroscopy.


1) Passive monitoring applications for fiber optic splitters are used for long-haul networks, cable TV ATM circuits or local/metropolitan area network maintenance. The splitter accesses a small portion of the optical traffic. Most of the signals arrive at their destination, but a small portion of the signal is directed to the local access port. Applications can be trouble-shooted manually, or they can be connected to a network monitoring system for ongoing maintenance and performance evaluation.

2) Fiber splitters are also available for FTTx / PON applications. This makes it possible to reduce the use of physical fibers or the basic amount of fibers required. A single fiber can be split into multiple branches to support multiple end-users. The strain on the fiber skeleton can be greatly reduced by application.

in conclusion

In summary, fiber optic splitters provide a solution to increase the efficiency of optical infrastructure. PLC splitters and FBT splitters differ in different ways, so it is also important to choose the right type of splitter for your network.

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