Posted in Optical Communication

Unguided Lightwave Systems

As the name indicates, in guided lightwave systems, there is no contained medium or channel. The channel used is open, that is the space itself….

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Posted in Communication

Lightwave systems for communication

Communication system transmits information from one place to another place separated by a distance, sometimes a few meters and sometimes thousands of kilometers. Communication between…

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Posted in Fiber Optic Components Optical Communication

Semiconductor Light Emitting Diodes and Laser Diodes

Both Semiconductor Light Emitting Diodes (LEDs) and Laser Diodes (LDs) are used in optical transmission as light sources. Semiconductor LEDs emit incoherent light, meaning the…

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Posted in Optical fibers and Cables

Introduction to Optical Fiber and Fiber Optics

Optical fibers are widely used in telecommunication, imaging and Laser industry. Optical fiber is basically transparent flexible cylindrical rods made of drawn silica glass or…

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Posted in Optical Communication

Why Multiplexing is Necessary?

A digital voice channel operates at 64 kilobits per second. Most fiber-optic communication systems are capable of transmitting at a rate of more than 10…

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Posted in Optical Communication

Long-haul and Short-haul Lightwave Systems

Application of fiber optic communication in telecommunication domain can be broadly grouped into two categories, long-haul and short-haul. This classification is done based on whether…

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Posted in Optical Communication

Return to Zero (RZ) and Non-Return to Zero (NRZ) formats

Design of an optical communication system starts by deciding how to convert electrical signals to optical signals. The output light from the source is modulated…

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Posted in Communication

Verbal and Non-verbal Communication

Spoken words, pictures or gestures can be used to communicate, generally grouped as verbal and non-verbal forms of communication. Sometimes effective communication comes from silence…

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Posted in Fiber Optic Components Optical Communication

Surface Emitting LEDs in Fiber Optic Communication

Light Emitting Diodes are the optical sources that made the fiber optic communication possible. Developments in LEDs are in parallel to the historical developments in…

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Posted in Fiber Optic Components Optical Communication

Coherent and Incoherent Light Sources

In Optical transmission, coherent light sources have clear advantages over incoherent light sources. The word Coherent means logical or consistent or clear. Incoherent is opposite…

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