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The Study of Optical Fibre and Digital Communication Trainer(OFT) and setting up a fibre optic analog link

Krishanu Mitra
12 May 2017
Read Time : 10 Minutes
The Study of Optical Fibre and Digital Communication Trainer(OFT) and setting up a fibre optic analog link

Fibre optic links can be used for transmission of digital as well as analog signals. Basically a fibre optic link contains three main elements: a transmitter, an optical fibre and a receiver. The transmitter module takes the input signal in electrical form and then transforms it into optical energy containing the same information. The optical fibre is the medium which takes the energy to the receiver. At the receiver, light is converted back into electrical form with the same pattern as fed to the transmitter.

Transmitter:

Fibre optic transmitters are composed of a buffer, driver and optical source. The buffer provides both an electrical connection and isolation between the transmitter and the electrical system the data. The driver provides electrical power to the optical source. Finally, the optical source converts the electrical current to the light energy with the same pattern. The optical source used is LED. The transmitter section comprises of Function Generator which generates input signals that are going to be used as information to transmit through optical fibre.

The Fibre Optic Link:

Emitter and Detector circuit on board form the fibre optic link. This section provides the light source for the optic fibre and the light detector at the far end of the fibre optic links. The optic fibre plugs into the connectors provided in this part of the board. Two separate links are provided.

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