Optical Fiber Communication is the latest and widely used method to transmit information through inferred light and these lights are transmitted through the fiber optic cables. There are mainly two types of optic cables are used - 1. Multi-Mode Optical Fiber Cable 2. Single-Mode Optical Fiber cable. The fiber-optic communication system used for a large distance, negligible electromagnetic interference, high bandwidth signals. In this article, we are going to see the Optical Fiber communication system block diagram. From this block diagram of optical fiber communication system, you can easily understand how a fiber optical system works.
The transmitter consists of an analog or digital interface, a voltage to current converter, a light source, and a source to fiber connector or coupler.
Fibre Optic Cable
The fiber optic cable is either an ultra-pure glass or plastic cable.
Receiver
The receiver includes a fiber to detector coupler, a light detector, a current to voltage converter followed by an amplifier, and an analog or digital interface.
The message’s origin may take several physical forms. A suitable transducer can be used to convert a nonelectrical message into an electrical signal.
For example, microphones are used for converting sound waves into currents and video cameras are used for converting images into currents. In some cases, such as data transfer between computers or parts of a computer the message is already in electrical form.
In any case, the information must be in the electrical form before transmission for either electronic or optic communication. In a fiber optical transmitter, the light source can be modulated by a digital or an analog signal. For analog modulation, the input interface matches impedances and limits the input signal amplitude.
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