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Optical cords

Optical cords

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Description

Creation of fiber-optical systems of information transfer is impossible without application of optical cords . Optical cords represent the main means of switching at creation of fiber-optical networks.

Versions

For the solution of problems of the most different direction optical cords are issued today in several versions from which it is possible to allocate two main:

  • patchkord an optical, or connecting cord -
  • the pigtail is an optical, or assembly cord.

Which main fundamental difference is bilateral or unilateral seal.

Patch cord optical

The optical patch cord of SC, ST, LC, FC represents the main means of switching of the optical active equipment, optical cases, and also intercross connections. Thus, the patch cord optical can provide internal connections in distributing devices (cross-countries), or switch distributing devices with the active optical equipment.

Production optical a patch cords is carried out from a duplex or simplex optical cable. For production of a cord the piece of a cable of the required length okontsovyvatsya from two parties by means of the connector. The type of the connector is a sign which considerably defines characteristics a patch cord. Depending on this sign distinguish two versions a patch cords:

  • patch cord optical connecting (for example, an optical cord of SC), the connector of one type having on both ends -
  • patch cord transitional on which different ends connectors of different types are mounted.

Besides, a patch cords can be made in single-mode and multimode execution. According to the standard standard single-mode cords are marked in the yellow color, and multimode – orange.

Pigtail

The pigtail optical represents the piece of an optical cable having seal on the one hand. To the name this type of a cord is obliged to English "pigtail" that in a literal translation means "a piggy tail". It should be noted that pigtail precisely asks not only appearance of this type of cords, but also the applied principle of connection to speak. The matter is that pigtails are applied to an okontsovka of a linear optical cable. One end of a pigtail okontsovyvatsya by the connector, and another remains free. The free end of a cord is connected to a linear cable by means of welding, or mechanical splaysa.

The type of the used connector is the defining sign and for pigtails. Depending on type of connectors distinguish several kinds of cords:

  • SC-pigtail
  • ST-pigtail
  • pigtail of FC and other types.

One of the most popular types is the pigtail of SC which provides more reliable switching. However both ST pigtail, and a pigtail of FC gained the widest circulation at creation of fiber-optical systems of information transfer. The choice of concrete modification of a pigtail depends, first of all, on specific conditions of functioning of a network, the applied active equipment and other individual characteristics.

 

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