There are many types of patch cords and pigtails. It is worth noting that fiber pigtails and patch cords are not a concept. The main difference between fiber optic patch cords and fiber optic pigtails is that only one end of the fiber optic pigtail has a movable connector, and both segments of the patch cord have movable connectors. In simple terms, the patch cord can be divided into two and used as a pigtail.
1.What are jumpers and pigtails?
Jumpers are cables directly connected to desktop computers or devices to facilitate device connection and management. Jumpers have a thicker protective layer and are often used between terminal boxes and optical transceivers.
Only one end of the pigtail has a connector, and the other end is an optical fiber connector, which is connected to other optical fiber cores in the form of fusion splicing, which generally appears in the optical fiber terminal box.
2.Types of optical fiber jumpers
Optical fiber jumpers are divided into single-mode fiber jumpers and multi-mode fiber jumpers in data transmission equipment. Single-mode fiber jumpers are generally yellow, connectors and protective sleeves are blue, wavelength is 1310nm/1550nm, and transmission distance is 10km/ 40km, long transmission distance;multimode fiber jumper: generally orange or lake blue, the connector and protective cover are beige or black, the wavelength is 850nm, the transmission distance is 500m, and the transmission distance is short.
Fiber patch cords can be generally divided into the following types according to the connector type:
①LC type optical fiber jumper: square connector, made of easy-to-operate modular jack (RJ) latch mechanism, is a connector for connecting SFP optical modules, often used in routers.
②SC type optical fiber jumper: rectangular connector, using plug-in bolt type fastening method, is the connector for connecting GBIC optical module, and is often used in routers and switches.
③ST type optical fiber jumper: round head connector, fastened by screw buckle, commonly used on optical fiber distribution frame.
④FC-type optical fiber jumper: circular optical fiber connector, the outside is made of metal material, and it is also fastened by turnbuckles, generally used on the ODF side.
⑤ MPO-type optical fiber jumper: It is composed of two high-precision plastic molded connectors and optical cables. It adopts a miniaturized design and has a large density and a stable and reliable connection.
⑥MTP type optical fiber patch cords: fiber patch cords with a large number of cores and small size are used in high-density integrated optical fiber line environments.
3.The type of pigtail
Like fiber jumpers, pigtails are divided into single-mode pigtails and multi-mode pigtails according to fiber types. The outer sheath of single-mode pigtails is yellow, with a wavelength of 1310nm/1550nm, and a transmission distance of up to 10km/40km. Long-distance connection; the outer sheath of the multi-mode pigtail is orange/lake blue, the wavelength is 850nm, and the transmission distance is 500m. It is used for short-distance connection. The fiber jumpers and pigtails provided by ETU-LINK have A variety of types to choose from.
Pigtails can generally be divided into the following types according to the connector type:
①LC-type pigtail connector: The size of the pin and sleeve of the LC-type pigtail connector is half of the above two connectors, which improves the space utilization of the optical distribution frame. It adopts a modular jack that is easy to operate. (RJ) The principle of latching is made.
②SC-type pigtail connector: It is made of engineering plastic material, the price is cheap, the shell is rectangular, the pins on the mating end surface are mostly PC or APC-type grinding methods, and the fixing method is plug-in latch type, which is convenient to operate and not easy to oxidize.
③ST-type pigtail connector: Different from SC-type pigtail connector, the core of the ST-type pigtail connector is exposed while the core of the SC-type pigtail connector is inside the connector. Usually, ST is used in the 10Mbps Ethernet system. Type pigtail connector, SC type pigtail connector is used in 10Mbps Ethernet.
④FC-type pigtail connector: also known as round threaded connector, it is made of metal and has good durability. It is often used on patch panels.
4.The application of jumpers and pigtails
Jumpers are mainly used for the connection between the optical fiber distribution frame or optical fiber information socket and the switch, the connection between the switch and the switch, the connection between the switch and the desktop computer, and the connection between the optical fiber information socket and the desktop computer. For management, equipment room and work area subsystems.
Pigtails are mainly used in optical communication systems, optical access networks, optical data transmission, optical CATV, local area networks (LAN), test equipment, optical sensors, serial servers, FTTH/FTTX, telecommunication networks and pre-terminated installations.
5.Precautions for jumpers and pigtails
① The transceiver wavelengths of the optical modules connected by the jumper must be the same. Generally, short-wave optical modules are matched with multi-mode jumpers, and long-wave optical modules are matched with single-mode jumpers to ensure the accuracy of data transmission.
②The jumper should reduce the winding as much as possible during the wiring process, so as to reduce the attenuation of the optical signal during the transmission process.
③The connector of the jumper should be kept clean. After use, the connector should be sealed with a protective cover to prevent oil and dust from entering. If it is stained, use a cotton swab dipped in alcohol to clean it.
④The pigtail is relatively slender, and the cross section of the pigtail is at an angle of 8 degrees. It is not resistant to high temperature and will be damaged if it exceeds 100°C. Therefore, avoid using it in high temperature environments.
Optical fiber connectors are an important part of optical fiber communication. In terms of data transmission, the quality of the ferrule, the production technology and methods all determine the stability of data transmission.