Learn more about fiber optic adapters

Optical fiber connector is the most widely used optical passive device in optical fiber communication system. Most optical fiber connectors are composed of three parts: two optical fiber connectors and one coupler. Two optical fiber connectors are installed into the two fiber tails, and the coupler acts as an alignment sleeve. In addition, the coupler is equipped with metal or non-metallic flange to facilitate the installation and fixation of the connector.

Optical fiber connectors of different interface types can be inserted at both ends of the optical fiber adapter to realize the conversion between FC, SC, St, LC, MTRJ, MPO, E2000 and other different interfaces. It is widely used in optical fiber distribution frame (ODF), optical fiber communication equipment, instruments, etc., with excellent performance, stability and reliability.

The two ends of the conversion adapter can be connected with different types of optical fiber connectors, and provide the connection between the APC end faces. The dual or multi connection adapter can increase the installation density and save space.

Product type 

According to the different optical fiber connectors, the optical fiber adapter can provide the corresponding optical fiber connector adapter.

Suitable fiber connector models are FC, SC, St, LC, MTRJ, E2000, etc

The applicable end faces of optical fiber connectors are PC, UPC, APC, etc

"SC" joint is a standard square joint, which is made of engineering plastics and has the advantages of high temperature resistance and not easy to oxidize. The optical interface of transmission equipment side generally uses SC connector.

The shape of "LC" joint is similar to that of SC joint, but smaller than that of SC joint.

"FC" connector is a metal joint, which is generally used at ODF side, and the pluggable times of metal connector are more than that of plastic joint.

Grinding method

PC grinding plane is a method of grinding the end face into a spherical surface. When the end face of optical fiber is ground by PC, the insertion loss is small and the signal is stable. Due to the grinding, the reflected light on the end face can be reduced and the return loss can be improved.

SPC grinding plane, special grinding technology makes the return loss of UPC grinding more than 50dB, especially suitable for SDH high-speed system.

APC (angel PC) lapping plane is a method of grinding the end face into an inclined 8 ° spherical surface. It can make the reflected light reflect to the outside of the optical fiber, and can get the return loss of more than 60dB. This method has low insertion loss and is mostly used for analog image transmission, especially for high-speed system, optical fiber CATV, EDFA, etc.

Product features

1. The insertion loss is low, and the connection loss per adapter is less than 0.2db

2. Good interchangeability

3. Good repeatability

Application

1. Optical fiber communication system

2. Limited television network

3. LAN, optical area network

4. Fiber to the home (FTTP)

5. Video transmission

6. Testing instrument

Optical fiber connector is a detachable (movable) connection device between optical fiber and optical fiber. It connects the two end faces of optical fiber precisely, so that the light energy output from the transmitting optical fiber can be coupled to the receiving optical fiber to the maximum extent, and the impact on the system caused by its intervention in the optical link is minimized. This is the basic requirement of the optical fiber connector. To a certain extent, optical fiber connector also affects the reliability and performance of optical transmission system.

Characteristic

1. Through 100% optical performance test, ceramic (zirconia) sleeve is processed by imported high-precision machine tool, with high-precision product finish and accurate axis positioning, ensuring the product coaxiality and Homo roundness accuracy coefficient

2. Integrated internal structure, unique design, simpler structure, easier to use, easy to assemble and improve efficiency

3. Good stability, small insertion loss in continuous plug and pull test

Optical fiber adapter accurately connects two connectors to transmit the most light source and minimize the loss. It is mainly used for the connection of optical cable to optical cable or cable to equipment. High matching and conversion type adapter, including special male female adapter. It has the advantages of low insertion loss, good interchangeability, good repeatability, high temperature resistance, acid and alkali resistance and stable performance.

Classification of optical fiber adapter

There are various forms of optical fiber connector. The connector used in EPON network is APC connector. The end face of APC is ground to an angle of 8 degrees to reduce reflection. The industrial standard return loss is - 60dB. APC connectors with precision, preset angle, predetermined radius and pre polished sleeve provide superior performance and can be used with compact key configurations with or without NTT-FC standard.

According to the different application scope and requirements of optical fiber adapter, in order to fix on various panels, the optical fiber adapter also designs a variety of fine fixed flanges. The adapter can connect different types of optical fiber jumper interfaces, and provides the connection between different sections. Double connection or multi connection can improve the installation density. According to the different configuration and docking section, the optical fiber adapter can be roughly divided into the following several common models: FC, SC, ST, LC, FC-SC, FC-ST, ST-SC, in addition to some bus to bus adapter.

FC optical fiber adapter --- the external reinforcement method is metal sleeve, and the fastening method is screw buckle. FC type connector adopts the butt end of ceramic pin. This kind of connector has the advantages of simple structure, convenient operation and easy fabrication. However, the fiber end is sensitive to dust and easy to produce Fresnel reflection, which makes it difficult to improve the performance of return loss. Later, this type of connector was improved by using the pin (PC) with spherical butt end face, but the external structure was not changed, which greatly improved the performance of insertion loss and return loss.

SC optical fiber adapter --- its shell is rectangular, and the structure size of the pin and coupling sleeve used are exactly the same as FC type. Among them, the end face of the pin is mostly grinded by PC or APC type, and the fastening method is plug-in latch type without rotation. It is equipped with metal shrapnel, which is convenient for concealed installation. This kind of connector has the advantages of low price, convenient plug-in operation, small fluctuation of insertion loss, high compressive strength and high installation density.

St optical fiber adapter --- it is a button type locking structure with key to ensure accurate alignment during connection, with strong tensile strength. Metal key positioning improves the repeatability and durability of the adapter. Precise ceramic or copper sleeve is used to ensure long-term stable mechanical and optical properties. Rectangular structure, tapping and riveting, easy to install and use.

LC optical fiber adapter --- it is made of easy to operate modular jack (RJ) latch mechanism. The size of the pin and sleeve is small, which improves the density of the optical fiber connector in the optical fiber distribution frame. Precision ceramic sleeve ensures long-term stable mechanical and optical properties.

HTF provides many kinds of optical fiber adapter. The function of optical fiber adapter in optical fiber communication network is as essential as that of power connector in circuit.