Common Fiber Optic Cable Types Review

Fiber optic cables has become a standard component in most contemporary cable infrastructures. As used for optical fibers varies, fibre optic cable manufacturers have produced cables to meet specific needs, and it is likely that moe will be created as future applications emerge. Bear in mind that different cable arrangements are variations on theme. Different combinations of buffer types, strength members, and jackets can be used to create cables to meet the needs of a wide of industries and uses.

Let’s go over several common types of fiber optic cables


The simplest types of cables are actually called cordage, and are used in connections to equipment and patch panels. They are typically made into patch cords or jumpers. The major difference between cordage and cables is that cordage only has one optical-fiber/buffer combination in a jacket, while cables may have multiple optical fibers inside a jacket or sheath.

The two common types of cordage are simplex and duplex.

simplex cordage

Simplex cordage consist of a single optical fiber with a tight buffer, and aramid yarn strength member, and a jacket. Simplex cordage gets its name from the fact that, because it is a single fiber, which is typically used for one-way, or simplex, transmission, although bidirectional communications are possible using a simple fiber.

Duplex cordage, also known as zipcord, is similar in appearance to household electrical cords. It is a convenient way to combine two simplex cords to achieve duplex, or two-way, transmissions without individual cords getting tangled or switched around accidentally.

duplex cordage

Distribution cable

Distribution cables is need when it requires to run a large number of optical fibers through a building. Distribution cable consist of multiple tight-buffered fibers bundles in a jacket with a strength member. These cables may also feature a dielectric central member to increase tensile strength, resist bending, and prevent the cable from being kinked during installations.

These cable are ideal for inter-building routing. Depending on the jacket type hey may be routed through plenum areas or riser shafts to telecommunications rooms, wiring closet, and workstations.

The tight-buffered optical fibers are not meant to be handled much beyond the initial installation, since they do not include a strength member and jacket. Distribution cables may carry up to 144 individual tight-buffered optical fibers, many of which may not be used immediately but allow for future expansion.

Armored cable

Armored fiber optic cable has two jackets. The inner jacket is surrounded by the armored and the outer jacket or sheath surrounds the armor. This cable can be used for indoor and outdoor applications.

Armored cables are used for outdoor application is typically a loose tube construction designed for direct burial applications. The armor is typically a corrugated steel tape surrounded by an outer polyethylene jacket. This combination of outer jacket and armor protects the optical fibers from gnawing animals and the damage that can occur during direct burial installations.

Armored cable for outdoor applications

Armored cables used for indoor applications may feature tight-buffered or loose-buffered optical fibers, strength members, and an inner jacket. The inner jacket is typically surrounded by a spirally wrapped interlocking metal tape armor. This type of armor is rugged and provides crush resistance. These cable are used in heavy traffic areas and installations that require extra protections, including protection from rodents.

Armored cable for indoor applications

Ribbon Cable

As it name indicate that fiber optic ribbon cable contains fiber ribbons, which are actually coated optical fibers placed side by side, encapsulated in Mylar tape, similar to a miniature version of wire ribbons used in computer wiring. A single ribbon may contain 4, 8, 12 optical fibers. Ribbon cable can be stacked up to 22 high.

Because the ribbon contains only coated optical fibers, this type of cable takes up much less space than individually buffered optical fibers. As a result, ribbon cables are denser than any other cable design. They are ideal for applications where limited space is available, such as in an existing conduit that has very little room left for an additional cable.

Besides, ribbon cables come in two basic arrangements wich is loose tube ribbon cable and jacket ribbon cable.

armored loose tube ribbon cable and jacket ribbon cable

In the loose tube ribbon cable, fiber ribbons are stacked on top of one another inside a loose-buffered tube. This type of arrangement can hold several hundred fibers in close quarters. The buffer, strength members, and cable jacket carry any stain while the fiber ribbons move freely inside the buffer tuber.

The jacket ribbon cable looks like a regular tight-buffered cable, but it is elongated to contain a fiber ribbon. This type of cable typically features a small amount of strength member and a ripcord to tear through the jacket.

Ribbon fiber provides definite size and weight savings, it does require special equipment and training to take advantage of those benefits. Connectors, strippers, cleavers, and fusion splicers must all be tailored to the ribbon fiber. For these reasons, ribbon fiber may not be the best solution in all situations.

Expect the above cables, there are also other fiber optic cable types like Submarine cable for carrying optical fiber underwater; Aerospace cable designed to be installed in aircraft and spacecraft; Aerial cable (figure 8 cable) for aerial installations; Hybrid cable combined multimode and single-mode optical fibers in on cable as well as the composite cable that designed to carry both optical fiber and current-carrying electrical conductors in the same run.