Insert-type optical splitter 1 point 4 points optical splitter fiber optic splitter 1 point 8 box type

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 with splitter type tray type plug-in type rack type&;&;
Application
rack type : Installed in a 18-inch cabinet; the installation equipment provided when fiber optic branching into the home is a standard digital cabinet; when it needs to be placed on the table.
B box type: installed in a standard rack; the installation equipment provided when the optical fiber branch is entered into the home is an optical cable transfer box; installed in the equipment specified by the customer when the optical fiber branch is entered into the home.
Bare fiber type ① Installed in various types of pigtail boxes. ② Installed in various types of test instruments and 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 functions of fixing, stripping, splicing, patching, splitting and other functions of optical fiber into the community or building. Later, it enters the end users in the form of optical fiber cables.
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: The maximum number of sub-adapter interfaces that can be configured in a single-layer pallet is the maximum number of sub-adapter interfaces that can be configured in a double-layer pallet.
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.
() Uniform light splitting can evenly distribute signals to users.
() Compact structure and small volume, it can be directly installed in various existing transfer boxes without special design, leaving a large installation space.
() A single device with many branching channels can reach more than 10 channels.
() Low multi-channel cost. The more branches there are, the more obvious the cost advantage will be.
Disadvantages
() The device manufacturing process is complex and the technical threshold is high. Currently, chips are monopolized by several foreign companies. 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 optical fiber The line is bare fiber type. (See package in the picture)
B box type package is B plastic shell regular size () ** ** **. (See package)
There is also bare fiber type package tray type Plug-in 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 on a quartz substrate to produce a layer of light splitting waveguide. 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 and square steel tube optical cable and optical fiber connector.
Technical indicators
Insertion loss.
The insertion loss of an optical splitter refers to the B number of each output relative to the input light loss. Its mathematical expression is:
- / where is the insertion loss of the th output port; is the th The optical power of the output port; is the optical power value of the input port. additional losses.
Additional loss is defined as the B number of the total optical power of all output ports relative to the input optical power loss. It is worth mentioning that the additional loss of optical fiber couplers 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. The insertion loss only indicates that the output power status of each output port not only takes into account the inherent loss factors, but also considers the influence 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 (except for even distribution). The splitting ratio of the optical splitter is related to the wavelength of the transmitted light. For example, when an optical splitter is transmitting light of . This situation is 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
b ①Type
b
b ②Input form
b
b ③Input fiber type
b B
Bb
b
b ④Input fiber length
b. According to customer requirements
b ⑤Output form
b
~~~~~
b ⑥Output fiber type
b B
Bb
b
b ⑦Output fiber length
b. Can be based on customer requirements
b ⑧Connector type
b /(/)