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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Two Types of WDM Connectivity – CWDM and DWDM

Intensive needs for great bandwidth availability and data transmission capacity have boosted the use of WDM in telecommunication. WDM (wavelength-division multiplexing) is a technology which multiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths (i.e., colors) of laser light. There are two types of WDM : CWDM and DWDM. What’s the […]

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Optical Multiplexing for High Speed Communication Systems

Introduction Optical transmission uses pulses of light to transmit information from one place to another through an optical fiber. The light is converted to electromagnetic carrier wave, which is modulated to carry information as the light propagates from one end to another. The development of optical fiber has revolutionized the telecommunications industry. Optical fiber has […]

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What is Wavelength Division Multiplexing Technology?

Wavelength division multiplexing (WDM) technology is an optical communication technology using frequency division multiplexing of optical domain to achieve simultaneous transmission on a single fiber channel optical signal. Wave-division multiplexing standard has large system capacity, high utilization of fiber optic long distance transmission line transmission equipment, capacity expansion and upgrade convenient, and is the best […]

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