Fiber tail fiber characteristics

Pigtail, also known as pigtail, has only one end with a connector, and the other end is a broken end of a fiber optic cable core. It is connected to other fiber optic cable cores by welding. It often appears in fiber optic terminal boxes. (couplers, jumpers, etc. are also used between them).

One end of the pigtail has a fiber optic connector, and the other end is a broken end of the optical fiber core. loss. Pigtails and jumpers are very similar in structure,

Simply put, the jumper is cut from the middle to form two pigtails. Pigtails have a variety of different connectors, common pigtails are usually 0.9mm in diameter and installed in the ODF unit.

fiber optic cabling

Classification of pigtails

Pigtails are divided into single-mode pigtails and multi-mode pigtails, which can be distinguished by color, wavelength, and transmission distance. The color of the outer sheath of the multimode pigtail is orange, the wavelength is 850nm, and the transmission distance is 500m, which is used for short distance connections, while the color of the outer sheath of the single mode pigtail is yellow, the wavelength is 1310m or 1550m, and its transmission The distance is longer, up to 10km or 40km.

In the notices of many pigtail connectors, you can see the words "FC/PC", SC/PC", etc. The letters in front of "/" represent the pigtail connector model, and the letters behind represent the pigtail connector. The grinding method. The pigtail is divided into multi-mode pigtail and single-mode pigtail. The multi-mode pigtail is orange with a wavelength of 850nm and a transmission distance of 5Km for short-distance interconnection. The single-mode pigtail is yellow and has two wavelengths. 1310nm and 1550nm, with transmission distances of 10km and 40km respectively. The ITU-T for ITU Telecommunication Standardization Sector (ITU-T for ITU Telecommunication Standardization Sector) specifies three types of commonly used optical fibers: optical fibers that conform to the G.652 specification, Fiber compliant with G.653 specification, fiber compliant with G.655 specification.

The following is a classification of common pigtail connectors:

1. FC type connector: FC type pigtail connector, also known as round threaded connector, is made of metal material. The number of pluggable times of metal material connectors is more than that of ordinary connectors, and it is often used on patch panels.

2. SC type connector: SC type pigtail connector has a rectangular shell, and the pins on the butt end face are mostly PC or APC type grinding methods, and the fixing method is plug type. Engineering plastics, so the price is cheap, and it also has the advantages of high temperature resistance, convenient operation, small loss fluctuation and not easy to oxidize.

3. LC type connector: The LC type pigtail connector is made of the modular jack (RJ) latch principle that is easy to operate. The size of the pins and sleeves used are the same as those of ordinary SC and FC type pigtail connectors. Half of the size, which can greatly improve the space utilization of the optical fiber distribution frame.

4. ST-type connector: For 10Base-F connection, the connector is usually ST-type, and for 100Base-FX, the connector is mostly SC-type. The core of the ST-type connector is exposed, while the core of the SC-type connector is inside the connector. The ST-type pigtail is usually used for wiring equipment, such as fiber distribution frames, fiber modules, etc.

The bundled pigtail has only one end with a connector, and the other end is a broken end of an optical fiber, which is connected to other optical fiber cores by fusion splicing.

Precautions for the use of pigtails

1. The pigtail should avoid looping as much as possible during use, which can reduce the attenuation of optical signals during transmission.

2. The optical module connected by the pigtail must match the pigtail. The short-wave optical module must be connected to a multi-mode pigtail, and the long-wave optical module must be connected to a single-mode jumper, so as to ensure the accuracy of data transmission.

3. The connector of the pigtail should be kept clean. After use, the connector should be protected and encapsulated with a protective sleeve to prevent oil, dust and mechanical damage.

4. Before use, the pigtail ceramic ferrule and the end face of the ferrule must be wiped clean with alcohol dipped in absorbent cotton.

5. When the pigtail is damaged due to man-made or other factors, the damaged jumper should be replaced in time.

The difference between pigtail and jumper

There are connectors at both ends of the jumper, and a thicker protective layer on the outside. It is generally used for the connection between the optical transceiver and the terminal box. It can also be used in optical fiber communication systems, optical fiber access networks, optical fiber data transmission, and local area networks. field.

Pigtails can be generally understood as two pigtails when the jumper is cut from the middle. Only one end of the pigtail has a connector, and the other end is a broken end of the fiber optic cable core. After fusion, it can be connected to other fiber optic cable cores for use.