Ethernet Products

Fiber Patch Cables

duplex_fiber_optic_patch_cord Fiber optic cable starts out as long glass tubes that are submerged in a hydrofluoric bath to remove any oils or other residue and impurities....

duplex_fiber_optic_patch_cord Fiber optic cable starts out as long glass tubes that are submerged in a hydrofluoric bath to remove any oils or other residue and impurities. The tubes are then spun in a lathe as they are super-heated by a hydrogen/oxygen fueled flame. At 35,000 degrees the tubes are filled with chemical gasses which contain silica. These gasses burn and create soot on the inside of the glass tube which heats and turns into more glass. Eventually it is heated so much that the glass tube closes in on itself creating a solid rod of glass. The glass rod is cooled in a bath and checked for impurities. The glass rod is then heated to 36,000 degrees in a vertical drawing tower which draws it out to a much thinner piece or fiber. As the glass slowly softens gravity pulls it down stretching it out to a very thin glass fiber to a width of only 5/1000 of an inch. An acrylic coating is baked on for protection.

Fiber optic cable has layers of plastic housing for protection. The core is the fiber optic which is where the light is sent down at just less than 300,000 kilometers per second. The next layer is cladding which is a protective sheet or coating of silica that increases total internal reflection of the core therefore preventing data loss or light loss. The silica acts like a mirror pointing inward at the fiber from all directions. When the fiber optic is bent the signal wants to disperse in different directions instead of continuing to travel directly down the fiber glass. The cladding helps prevent this by reflecting the light back into the glass fiber. The next layer is the buffer layer, it is a protective layer that provides only a physical protection to the glass, and there may be more than one of these layers. The final layer is the jacket and is the same as any other cable jacket, so it can be easily scored to pull back and expose the cable for termination. All of these layers of acrylic and plastic are meant only for protection and not shielding from other electromagnetic interferences, this is because fiber optic cable uses light as a means for transporting data fiber optic cable is immune to alien crosstalk.

There are two general types of fiber optic cable: Single mode and Multimode. The glass fiber optic in a single mode cable has a smaller diameter which means it has less chance for dispersion or loss of data. The light signal sent through a single mode cable is cleaner and ends up at the other end of the cable very close to how it started. Single mode fiber optic cable is generally used for long distance runs because of how well it maintains a signal; however this does mean that it is much more difficult to terminate. Multimode fiber optic cable is used for shorter runs within a LAN (local area network) and has a much larger diameter core than a single mode.

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