Basic Knowledge About EDFA

In optical communication network, signals travel through fibers for very large distances without significant attenuation. However, when the signals need to transmit several hundreds of kilometers, it becomes necessary to amplify the signals during transit. EDFA (erbium doped fiber amplifier), commercialized in the early 1990’s, became a key enabling technology for optical communication networks, and […]

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A Key Component in DWDM System – Wavelength-Converting Transponder

The evolution of dense wavelength-division multiplexing (DWDM) systems is going on with an explosion in traffic and an increase in bandwidth-hungry applications for more multimedia services. Dense wavelength-division multiplexing, as an important technology in fiber optical network, is ideal for fiber optical based solutions. By converting the operating wavelength of the incoming bitstream to an […]

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Raman Fiber Amplifiers – Advancements to Long Haul Transmission

Introduction Raman Fiber Amplifier (RFA) is used to assiste optical transmission system design issues such as mid-span optically amplified distance, bandwidth enhancement. The RFA does not suffer from the limitations of Erbium-Doped Fiber Amplifier (EDFA) in that it can be integrated with the transmission fibers, and pumped at any wavelength to provide wide gain bandwidth […]

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Advanced Optical Components – Erbium-doped Fiber Amplifier (EDFA)

Many fiber optic applications, such as long-haul DWDM systems, require amplification of the optical signal. In the past, this entailed using expensive electronic repeaters at intermediate points every 100 km. Today’s modern long-haul DWDM systems use several advanced optical components to replace multiple repeaters with a single optical device. These optical devices which are called […]

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Erbium-doped Fiber Amplifier

Optical amplifier is an optical communication system device. It amplifies an optical signal directly, without converting an optical signal into an electrical signal. Erbium-doped fiber amplifier (EDFA) is the first successful optical amplifier invented by the UK Southampton University and JP Tohoku University. It is one of the greatest invention in optical communication. Erbium-doped optical […]

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