Fibre Optic PON importance explained.

Share post

Fibre Optic Networks

Fibre Optic PON uses a light-signal for transmitting data, everyone understands this.

But, not everyone is aware that there are different ways to allow these signals to reach their intended destination.

As such, there are a number of optical network that are used to reach this goal:


    Firstly –      Active Optical Network (AON)


    Secondly –     Passive Optical Network (PON)


In this article, we will focus on the second network type.

Herein, we will see why the Passive Optical Network is gaining importance today.


Fibre Optic Passive Optical Network:

PON technologies (PON) are being implemented in the telecom industry.

A point-to-multipoint framework is achieved by implementing this. A PON fibre optic network will be able to serve a lot of endpoints from one optic fibre.

Unpowered Splitters make this possible.



Attenuation of light through an optical splitter is symmetrical. Whether a splitter is combining light in upstream transmission or dividing light in the direction of the downstream signal, it still introduces the same attenuation to an optical input signal

The end result of this type of fibre optic access network is that there is no necessity for each customer to be linked to the hub using their own distinctive fibre as they can share one fibre between multiple users.


Fibre Optic Passive Optical Network components?

A PON network will contain multiple “Optical Network Units” or ONUs and “Optical Line Terminations” or OLTs.

The OLT will be placed in the central office of your service provider generally. With up to 32 ONUs placed as close as possible to the end receivers.


Fibre Optic PON network



The term “passive” represents the fact that when the fibre network traverses there is no need for active electronic parts. Which means they do not need to be electrically powered.

Therefore the passive optical network allows expensive hardware components to be shared.

To do this a splitter will take input and divide the signal to pass on to multiple users. A PON network is designed to deliver voice, data, and video signals.

This is an upstream and downstream process. It sends Voice, Data and IP video downstream using 1490 nm wavelength. Video downstream at 1550 nm and Voice and data upstream at 1310 nm wavelength.


Fibre Optic Passive Optical Network advantages:

There are lots of advantages associated with deploying a passive optical network.

Some of them include:


    – Decreased operational, installation and network energy costs.

    – Reduced network infrastructure requirements.

    – No need for network switches.

When you deploy a PON network, it will replace a bunch of copper wires with smaller and cost-effective single-mode fiber optic cable.

Which enables for longer distances between a PC and data centres.

Another benefit is that it gives you a far more secure connection than copper can.


Why should you test the PON before Deployment?

Testing is very important before deploying a Passive Optical Network.

Because the degree of reflectance inside the network should be within acceptable parameters to meet customer’s expectations.

If you do not do any testing, then the reflectance and loss of signal could be too high within the network, this may cause severe performance problems. Optical fiber testing being within the specified criteria is critical.

A PON Power Meter can test the Passive Optical Network. This equipment tests the wavelength frequency that is to be used in the network in such a way that any problems (if present) will be highlighted immediately.






 A PON “passive optical network” offers many advantages.

Because of these advantages, it has gained a lot of attention from service providers and is being widely deployed today.

For more information on  PON networks and the role they play in Fibre to the Home FTTH networks and gpon technology click here!