Introduction to PLC Splitter
PLC Planar Waveguide Optical Splitter (PLCSplitter) is an integrated waveguide optical power distribution device based on a quartz substrate. Like coaxial cable transmission systems, optical network systems also need to couple, branch, and distribute optical signals. Need optical splitter to realize.
It is one of the most important passive components in the optical fiber link. It is an optical fiber tandem device with multiple input ends and multiple output ends. It is especially suitable for connecting the central office and the end of the passive optical network (EPON, GPON, BPON, etc.) Terminal equipment and realize the branch of optical signal.
Bare fiber type, miniature (steel tube/module) type, ABS box type, splitter type, tray type, insert type, rack type...
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: ① installed in the optical cable connector box. ②Install in the module box. ③Install in the wiring box. Plug-in type: This device 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. Choose high-quality fiber optic connectors and adapters, with low insertion loss and high return loss; Note: A single-layer tray can be configured with a maximum of 1 point and 16 adapter interfaces, and a double-layer tray can be configured with a maximum of 1 point and 32 adapter interfaces.
Insertion loss. The insertion loss of an optical splitter refers to the dB number of each output relative to the input optical loss. Its mathematical expression is: Ai=-10lg Pouti/Pin, where Ai refers to the insertion loss of the i-th output port; Pouti is The optical power of the i-th output port; Pin is the optical power value of the input. Additional loss. The additional loss is defined as the DB number of the total optical power of all output ports relative to the loss of the input optical power. It is worth mentioning that for optical fiber couplers, the additional loss is an indicator of the quality of the device manufacturing process and reflects the inherent loss of the device manufacturing process. The smaller the loss, the better, and it is an evaluation indicator of the quality of the manufacturing. The insertion loss only indicates the output power status of each output port, not only has the inherent loss factor, but also considers the effect of the splitting ratio. Therefore, the difference in insertion loss between different fiber couplers does not reflect the quality of the device. Split ratio. The splitting ratio is defined as the ratio of the output power of each output port of the optical splitter. In system applications, the splitting ratio is indeed based on the optical power required by the actual system optical nodes to determine the appropriate splitting ratio (except for the average distribution). The splitting ratio of the optical splitter is related to the wavelength of the transmitted light. For example, when an optical splitter transmits 1.31 μm light, the splitting ratio of the two output ends is 50:50; when transmitting 1.5 μm light, it becomes 70: 30 (The reason for this situation is that the optical splitter has a certain bandwidth, that is, the bandwidth of the transmitted optical signal when the splitting ratio is basically unchanged). Therefore, the wavelength must be specified when ordering an optical splitter. Order notice
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