Evolution in telecommunication – Fibre Optic Cable

In 1854, British physicist John Tyndall discovered the principle of optical fiber by watching a stream of water flowing out of a barrel. Optical fibers have very small diameters which are often no greater than the diameter of a human hair.


Fiber Optical Cable is made from glass & silica. Most interesting thing is Signal travel through optical cable is in light form & working is based on the principle of total internal reflection.ApplicationofFibreOptic

Optical fibers have played a key role in making possible the extraordinary growth in world-wide communications that has occurred in the last 25 years, and are vital in enabling the proliferating use of the Internet. Without an optical cable, communication in today’s world is impossible.

Applications of Fiber Optics

The optical fibers have many applications. Some of them are as follows −

  • Used in telephone systems
  • Used in sub-marine cable networks
  • Used in data link for computer networks, CATV Systems
  • Used in CCTV surveillance cameras
  • Used for connecting fire, police, and other emergency services.
  • Used in hospitals, schools, and traffic management systems.
  • They have many industrial uses and also used for in heavy duty constructions.

As transmission speeds increase in ApplicationofFibreOptic
data center and enterprise networks, it becomes increasingly important to adopt a cabling-infrastructure strategy that considers multiple generations of network evolution. Deploying a cabling system that can support current and future needs requires thoughtful planning, and also requires an approach that is both robust and flexible.


Generally, sooner or later any network installer and planner reaches the limits of current network media – be it coaxial cables using HFC technology or EOC, or copper networks using ADSL or VDSL, or even Ethernet over Power networks. And yes, radio waves also have it’s limits as we will see further in this article. In general, here are 10 main advantages to chose optical fiber as transmission media for your networks:

  • Long Transmission Distance
  • EMI and RFI immunity
  • Low cost
  • Dielectric benefits
  • Small size
  • Light weight
  • Easy installation
  • Secure transmission
  • Not attractive to fraud


First is cost consideration. On average, fiber optic cable installation costs $1 to $6 per foot depending on the fiber count. So, in today day by day scenario any of the company is not capable to install new fiber optic cable. Instead of that they preferred taking fiber on leased for a long period of time.

  • Difficult to Splice

The optical fibers are difficult to splice, and there are loss of the light in the fiber due to scattering. They have limited physical arc of cables. If you bend them too much, they will break.

  • Expensive to Install

The optical fibers are more expensive to install, and they have to be installed by the specialists. They are not as robust as the wires. Special test equipment is often required to the optical fiber.

  • Highly Susceptible

The fiber optic cable is a small and compact cable, and it is highly susceptible to becoming cut or damaged during installation or construction activities. The fiber optic cables can provide tremendous data transmission capabilities. So, when the fiber optic cabling is chosen as the transmission medium, it is necessary to address restoration, backup and survivability.

  • Can’t Be Curved

The transmission on the optical fiber requires repeating at distance intervals. The fibers can be broken or have transmission losses when wrapped around curves of only a few centimeters radius.


Fiber optic cable has both advantages and disadvantages. However, in the long run, optical fiber will replace copper. In today’s network, fiber optic cable becomes more popular than before and is widely used.

And due to this wide use of optical cable whole communication system is developed called as Optical Communication System.

You can check all the stuff related to Fiber Optical Communication in below provided link very interesting as it is in complete animated view.


Other sources:

You can find working Principal of optical communication & type of optical cable in below mention link:

  • http://www.explainthatstuff.com/fiberoptics.html
  • https://www.tutorialspoint.com/principles_of_communication/principles_of_optical_fiber_communications.html

Here you can check how it is globally spread on earth.

  • http://edition.cnn.com/2014/03/04/tech/gallery/internet-undersea-cables/index.html
  • https://www.newscientist.com/article/mg21328566-000-fibre-optics-to-connect-japan-to-the-uk-via-the-arctic/

You can check the major advantages of optical fiber here:

  • http://www.ad-net.com.tw/10-advantages-of-using-optical-fiber-in-networks/


10 thoughts on “Evolution in telecommunication – Fibre Optic Cable

    1. Dear, The light from the fiber optic cable does not radiated significantly, so due to that they provide the high degree of security. In conventional cable like telephone & television cable (or Copper Cable ) you can able to stolen an information by trapping the cable.
      But in optical communication when you make cut on the cable, signal is lost as it works in the principal of Total Internal Reflection. This feature is obviously
      attractive for military, banking and general data transmission (i.e. computer network)

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