Attività

PLC (Planar Lightwave Circuit) splitter is an important component in PON (passive optical network) where a single optical input is split into multiple outputs. This makes it possible to deploy a Point to Multi Point physical fiber network with a single OLT (optical line terminal) port serving multiple ONTs (optical network terminal). The most common split ratios are 1:N or 2:N. N represents the output ports, usually as 2, 4, 8, 16, etc. The optical input power is distributed uniformly across all output ports. The PLC Splitter shares the cost and bandwidth of the OLT and reduces fiber lines. This article will tell about how to keep a high quality PLC splitter from manufacturing to testing sides.

PLC splitter is composed by many miniature parts. Among them, there are three main components: fiber array for the input and output, and the chip. These three main components decide whether the PLC splitter is of good quality or not. Let’s see the key manufacturing steps of a PLC splitter.

In a PON system, the downstream transmission uses 1490nm wavelength and 1310nm wavelength for the upstream transmission. Besides, the requirement for RF video overlay and network testing/maintenance should also be considered. The transmission wavelength for RF video is 1550 nm. And the wavelengths for networking testing and maintenance are 1550 nm and 1625 nm. So the standard opterating wavelength for a PON splitter is determined as 1260~1650 nm which covers most of the optical bands.

Directivity is the part of power transferred from one input port to another input port or from an output port to another output port. For a 2xN optical splitter, when light injects into one of the input ports, light doesn’t only propagate out of the output ports. Some of the light propagates back through the second input port. And when the light injects into one of the output ports, light propagates back through the other output ports. In a bidirectional transmission system such as a PON, directivity is useful to reduce signal crosstalk. A high directivity value will increase the insertion loss due to the optical power loss.

In FTTx and PON architectures, fiber optic splitter is an important component to share the optic network with multiple users. The basic principle of fiber optic splitter is to split one optic light beam into several parts at a certain ratio.
It is an upgraded version of the odf optical fiber distribution cabinet. It is also used for fiber termination, fiber fusion splicing, fiber wiring and fiber storage, but it uses the tray in the box to slide down. Out-of-line design, so that you can install both the adapter panel and the high-density MPO/MTP wiring box. It is a commonly used wiring tool for local area networks and data centers, and can ensure long-term and reliable network transmission.

The optical fiber distribution cabinet has various specifications, the common ones are rack type and wall-mounted box type. U or RU as the unit, refers to the height of the equipment designed to be installed in the rack, usually 1RU, 2RU, 4RU size. It has a sliding-out and sliding drawer design, which not only can be flexibly wired but also can protect the optical fiber very well. It is an ideal wiring management solution for data centers.

What is Fiber Optic Adapter?