Introduction to the Components Used in DWDM System

DWDM is an innovation that enables multiple optical carriers to travel in parallel in a fiber. DWDM devices combine the output from several optical transmitters for transmission across a single fiber. At the receiving end, another DWDM device separates the combined optical signals and passes each channel to an optical receiver. Only one optical fiber […]

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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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Dual Stage EDFA with DCM Mid-Stage Access – DCM-optimized EDFA

Besides optical amplifiers, modern optical networks also require other components to be place along the link, such as the Dispersion Compensation Module (DCM) used to correct signal distortion due to Chromatic Dispersion of the transmission fiber. Since the attenuation of DCM can be quite large, in the range of 5 to 10 dB, additional amplification […]

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Passive and Active Network Fundamentals

Today we have access to more information than ever before. We live in a digital world and bandwidth is what makes a digital world happen. Aging copper networks are being taxed by residential and business customers. However, Passive Optical Network (PON) such as Fiber-To-The-Home (FTTH) are increasingly being deployed to meet the current and future […]

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