Carrier grade PLC box type optical splitter fiber optic splitter planar waveguide type splitter

Introduction: It is one of the most important passive devices in optical fiber links. It is an optical fiber tandem device with multiple inputs and multiple outputs. It is especially suitable for connecting central offices and terminals in passive optical networks (,, B, etc.) equipment and implement splitting of optical signals.
Classification
Bare fiber type, micro (steel pipe/module) type, B box type, branch type, tray type, plug-in type, rack type
Application
Machine Rack type: When installed in a 1-inch cabinet for fiber branching into the home, the installation equipment provided is a standard digital cabinet when D needs to be placed on the table.
B box type: installed in a standard rack when the optical fiber branch enters the home. The installation equipment provided is an optical cable transfer box. When the optical fiber branch enters 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 DM systems.
Splitter type: ① Installed in various types of optical distribution equipment. ②Installed in various types of optical test instruments.
Micro: ①Installed in the optical cable connector box. ②Installed in the module box. ③Install in the wiring box.
Plug-in type: This equipment is used for user access points in the system that need to split light. It mainly completes the termination of optical cables entering the community or building, and has the functions of fixing, stripping, splicing, patching, shunting, etc. of optical fibers. Function, after splitting, it enters the end user in the form of optical fiber cable.
Tray type: suitable for integrated installation and use of various types of optical fiber splitters, wavelength division multiplexers, etc.
Use high-quality fiber optic connectors and adapters, with low insertion loss and high return loss
Note: A single-layer pallet can be configured with a maximum sub-adapter interface, and a double-layer pallet can be configured with a maximum sub-adapter interface.
Advantages and Disadvantages
Advantages
) The loss is not sensitive to the wavelength of the transmitted light and can meet the transmission needs of different wavelengths.
The light distribution is uniform, and the signal can be evenly distributed to users.
With compact structure and small size, it can be directly installed in various existing transfer boxes without special design to leave a large installation space.
A single device has many branch channels, which can reach more than 10 channels.
Multi-channel cost is low, the more branches, the more obvious the cost advantage.
Disadvantages
The device manufacturing process is complex and the technical threshold is high. Currently, chips are monopolized by several foreign companies, and there are only a few domestic companies capable of mass packaging production.
Compared with fused tapered splitters, the cost is higher, especially in low-channel splitters. []
Packaging method
The packaging of optical splitters is the difficulty in manufacturing optical splitters. Packaging technology directly affects the performance of the product. []
Micro packaging: generally stainless steel, The optical fiber line is bare fiber type. (See the package in the picture)
The B box type package is a B plastic shell, and the regular size (MM) is ** ** **. (See the package)
There is also a bare fiber type Package, tray type, plug-in type, rack type, etc.
Components
The interior consists of an optical splitter chip and optical fiber array coupling at both ends. The chip uses a semiconductor process to grow a layer of light-splitting waveguides on a quartz substrate. The chip has an input end and an output end waveguide. Then the input and output optical fiber arrays are coupled respectively at both ends of the chip.
The exterior consists of B box, square steel pipe, optical cable and optical fiber connector.
Technical indicators
Insertion loss.
The insertion loss of an optical splitter refers to the dB loss of each output relative to the input light. Its mathematical expression is: = / , which means that the insertion loss of the th output port is Optical power is the optical power value at the input end. additional losses.
Additional loss is defined as the DB number of the total optical power of all output ports relative to the input optical power loss. It is worth mentioning that for optical fiber couplers, additional loss is an indicator of the quality of the device manufacturing process. It reflects the inherent loss of the device manufacturing process. The smaller the loss, the better. It is an assessment indicator of the quality of the manufacturing process. Insertion loss only represents the output power status of each output port, not only the inherent loss factor, but also the impact of the splitting ratio. Therefore, the difference in insertion loss between different optical fiber couplers does not reflect the quality of device manufacturing. Split ratio.
The splitting ratio is defined as the output power ratio of each output port of the optical splitter. In system applications, the splitting ratio is indeed determined based on the optical power required by the actual system optical node. The appropriate splitting ratio (average distribution Except for ), the splitting ratio of the optical splitter is related to the wavelength of the transmitted light. For example, when an optical splitter is transmitting .micron light, the splitting ratio of the two output ends is: When transmitting .mm light, it becomes: (This happens because optical splitters have a certain bandwidth, that is, the frequency bandwidth of the transmitted optical signal when the splitting ratio is basically unchanged). Therefore, the wavelength must be specified when ordering an optical splitter.
Ordering Instructions
m ①Type
m
m ②Input form
m = h ,= h
m ③Input fiber type
m =Br,=
m ④Input fiber length
m, according to customer requirements
m ⑤Output form
m =h,=h,~~~~~
m ⑥Output fiber type
m =Br,=
m ⑦Output fiber length
m, can be based on customer requirements
m ⑧Connector type
m // //M