Fiber Optic Networks

Fiber Optic Cables Overview

The fiber optics cables are the most common seen items in telecom. Fiber optic cable is made up of a bundle of glass threads that are able to transmit data modulated onto light waves. Using fiber optic holds many advantages over conventional copper or other metal based data cable.

Fiber optic cable is especially advantageous for long-distance communications as the light propagates through the fiber with little attenuation compared to electrical cables. Each fiber can carry many independent channels, each using a different wavelength of light called wavelength division multiplexing (WDM).

For short distance application, such as a network in an office building, fiber-optic cabling can save space in cable ducts. This is because a single fiber can carry much more data than electrical cables. Fiber is also immune to electrical interference as there is no cross-talk between signals in different cables and no pickup of environmental noise. The non-armored fiber cables do not conduct electricity, which makes fiber a good solution for protecting communications equipment in high voltage environments, such as power generation facilities, or metal communication structures prone to lighting strikes. They can also be used in environments where explosive fumes are present, without danger of ignition.

When installing fiber optics cables care must be taken to ensure that cable is not bent, stretched or deformed. The best case is that the fiber core will break and will become faulty, the worst case is that the fiber optic core will be deformed or damaged and cause signal distortion that results in intermittent faults.

Two Main Categories of Fiber Optical Cables
Single-mode – This type of fiber optic cable features a very small glass core which allows for only one mode of light to propagate. The core of single mode cable is usually about 9/125 micron in diameter. The smaller core allows for digital signals to travel further, at higher speeds without attenuation occurring making it ideal for communications.

Multi-mode – In this type of fiber optic cable, the diameter of the core is much larger than the wavelength of the light that is transmitted through it. The main types of multimode fiber optic cable are 62.5/125 micron and 50/125 micron in diameter. Having a larger core means that more data can be passed through the cable at once; however, over longer distances, the overall signal quality deteriorates. Multimode fiber optic cable is used most often in LANs, but is not suitable for use by a cable or internet service provider. is a B2B marketplace, collecting numerous telecom suppliers, manufactures and markets a range of high-performance fiber optic components and integrated modules incorporating these components. Offer a range of fiber optic products, including interconnect devices that are used to connect optical fibers and components, optical couplers and splitters that are used to divide and combine optical power, and dense wavelength division multiplexing (DWDM), devices that separate and combine multiple specific wavelengths. The products deployed in long-haul networks that connect cities, metropolitan networks that connect areas within cities, last mile access networks that connect to individual businesses and homes, and enterprise networks within businesses.

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