Introduction, function and application of PLC optical splitter

Introduction, function and application of PLC optical splitter

PLC Planar Waveguide Optical Splitter (PLC Splitter) is an integrated waveguide optical power distribution device based on a quartz substrate. It is the same as the coaxial cable transmission system. The optical collection system also needs to couple and branch the light signs. , Divide, this needs optical splitter to realize. It is one of the most important passive components in the optical fiber link. There are multiple input ends and multiple output optical fiber junction devices, which are especially suitable for passive optical convergence (EPON, GPON, BPON, etc.) adjacent to the central office. And the terminal equipment and realize the branch of the light sign.

The role of the optical fiber attenuator, the optical fiber attenuator can comply with the user's request to attenuate the energy of the light signal as expected. It is often used in the system to receive or reflect the optical power margin, to evaluate the cost of the system, and various attempts. There are many types of optical fiber attenuators, and different types of attenuators use different working principles.

4 series of fiber optic attenuators. The fixed optical attenuator is mainly used for fixed attenuation of the light energy in the optical path, and its temperature characteristics are excellent. In the system debugging, it is often operated to simulate the response attenuation of the light signal after entering a section of optical fiber: or used in the discontinuous station to reduce the abundant optical power to prevent saturation of the receiver: it can also be used to calibrate the optical test instrument target. For different line interfaces, different types of fixed attenuators can be operated. If the interface is a pigtail type, a pigtail type fiber attenuator can be welded between the two optical fibers of the optical path: if there is a connector interface during the system debugging process, a conversion or converter type fixed attenuator can be used. convenient.

As we all know, when two optical fibers are connected, they must achieve a relatively high centering accuracy so that the light signal can be transmitted at a relatively low cost. Conversely, if the alignment accuracy of the optical fiber is adjusted appropriately, the attenuation can be controlled. Displacement optical fiber attenuator is to comply with this principle, and deliberately make the optical fiber have a certain misalignment when it is connected, so that some light energy is lost, so as to achieve the goal of restraining the attenuation.

Since the actual optical fiber is not an ideal optical fiber, its mode coupling theory is very complicated. So far, there is still no standard mathematical model. Different researchers have adopted different methods, and their conclusions are slightly different. Here, we will derive the theory that dominates wave optics.

Through the introduction of the role of PLC, we can see that its application fields are very broad, and its main applications are often:

Rack type: installed in a 19-inch OLT cabinet; when the fiber branch enters the home, the installation equipment provided is a standard digital cabinet; when the ODN needs to be placed on the table.

ABS box type: installed in a 19-inch standard rack; when the fiber is branched into the home, the installation equipment provided is an optical cable transfer box; when the fiber is branched into the home, it is installed in the equipment specified by the customer.

Bare fiber type: ① Installed in various types of pigtail boxes. ② Installed in various types of test instruments and WDM systems.

Splitter type: ① installed in various types of optical distribution equipment. ②Installed in various types of optical test instruments.

Mini type: ① installed in the optical cable connector box. ②Install in the module box. ③Install in the wiring box.

Plug-in type: This equipment is used for user access points in FTTX system that need to split light. It mainly completes the end of the optical cable entering the cell or building. It has the functions of fiber fixing, stripping, fusion, jumper, branching, etc. Then enter the end user in the form of home fiber optic cable.

Tray type: suitable for integrated installation and use of various types of optical fiber splitters and wavelength division multiplexers.

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