Protons and neutrons always stick together because of the strong nuclear force between them. Electrons have negative charge, protons have positive charge and neutrons have no charge. Each atom has a set of electrons, protons and neutrons. These particles are electrons, protons and neutrons. There are some particles which are much smaller than atoms. However, atoms are not the smallest particles in the universe. As the name suggests, laser amplifies the light by using a process called stimulated emission of radiation.Įvery object in the universe is made up of tiny particles called atoms. LASER stands for Light Amplification and Stimulated Emission of Radiation. Before we jump into EDFA, first let’s see how the actual laser works. After that EDFA is pumped with laser, to achieve optical gain.ĮDFA uses population inversion technique to achieve optical amplification. For that purpose, we use WDM (Wavelength Division Multiplexing) coupler to multiplex laser into EDFA. Before that, laser needs to be multiplexed into the erbium doped fiber. We can’t directly send laser light into EDFA. The erbium doped fiber is pumped with a laser, at a wavelength of 980 nm or 1480 nm and produce optical gain in the 1550 nm region. Hence, it is named as EDFA (Erbium Doped Fiber Amplifier). This erbium doped fiber act as a gain medium that amplifies an optical signal. When a normal optical fiber core is doped with trivalent ‘ erbium’ ions, erbium doped fiber is formed. How EDFA (Erbium Doped Fiber Amplifier) Works EDFA DefinitionĮDFA (Erbium-Doped Fiber Amplifier) is an optical device used to compensate optical signal attenuation caused by fibers and components, to increase optical transmission distance.ĮDFA is an optical device that amplifies the optical signals without optoelectronic and electro optical conversion. The working principle of EDFA is same as that of lasers excepting that EDFA do not require a cavity where as cavity is required for laser oscillation. In addition to this, the network upgrading is cost effective with optical amplifiers. The optical amplifiers can extend the optical signal transmission distance without the need of regenerator station. With the advent of optical amplifiers, things become much easier. Can we use same block diagram in optisimu to optisystem upgrade#However, installing the regenerator station requires a lot of money and is not easy to upgrade the whole network. The regenerator station will electronically regenerate the optical signals to overcome the optical signal loss due to the attenuation of optical fiber. Can we use same block diagram in optisimu to optisystem install#In the past, if we want to increase the optical signal transmission distance, optical regenerator station is required to install in the fiber optic link for every 80 km to 100km. The most common type of optical amplifiers are EDFA. EDFA stands for Erbium-Doped Fiber Amplifier. Optical signal amplifiers provide amplification of optical signals by using a method called stimulated emission of photons. For amplifying the optical signals, we use a device called optical amplifier. In order to compensate this optical signal loss, we need to amplify the optical signals. However, when transmission distances become hundreds of kilometers, some signal loss will occur. In optical fiber communication, light signals are transmitted through the optical fiber for very large distances without signal attenuation.
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