The Importance of Fiber Optic Cable Construction
The structure of bulk fibre optical cables has many important characteristics. The fiber cable
construction needs to provide protection from outside environment during its installation and throughout the fibre cable's working life time.
They must provide mechanical protection for all the fibres inside the cable, in the meantime, the cable has to be pretty easy to handle. Most the time, non-metallic strength members are needed to fully take advantage of fiber's dielectric property.
Bulk fiber optical cables will experience tensile stress, abrasion, cutting, flexing, bending, crushing during the installation and its operation life. These mechanical stresses introduce macrobending, microbending, light signal loss attenuation.
Because of manufacturing imperfectness, small surface defects often exist in the optical fibres. So in the real world, fibres tend to break at the cracks that begin from these surface defects under heavy tensile tension.
Bulk Fiber Optic Cable Structural Elements
Optical cables can be divided into several main types. However, the basic elements in a fiber cable are a central strength member, be it metallic or non-metallic, strength members, water barrier (dry water swelling tapes or water blocking gel), a fiber housing (loose tube), and cable sheaths. Armored fiber cables also have aluminum or steel armors for rodent protection for direct burial.
A central strength member sits at the center of the cable, made of fiberglass most of the time. This central strength member provides rigidity to the optic cable, preventing the bulk fibre cable from being bent too sharply. It also provides the core about which the cable is built up.
In addition to the central strength member, another layer of fibre like strength member is also used. They are made of Aramid yarn (most of the time), Nylon yard, fiber glass epoxy rod or even steel. Aramid yarn is also called Kevlar, it has a high breaking strain and about fiber times stronger than steel. They provide low weight and all-dielectric construction.
Types of Bulk Fiber Optic Cable
Bulk fiber optical cables can be categorized into several major types. That includes aerial cable, underground cable, subaqueous cables and more. To learn more about the type of fiber cable available on the market, you can click on the Fiber Optics For Sale Co's web pages shown below.
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