Optical Fiber Amplifiers and Their Working Process

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Traditionally, for optical signal amplification electronic repeaters were used. A repeater is an opto-electro-opto device. It generally converts a weak optical signal into electronic signal, then cleans up the electronic signal, and converts the electronic signal back to optical signal with the help of a light wave transmitter. However, this is an inconvenient and much expensive process and this is the reason why it has been replaced by the new optical attenuator fiber amplifiers technology. An optical fiber amplifier is an optical device. It never converts the incoming optical signal to electronic signal at all. You can even refer it an in-line laser. An optical fiber amplifier can simultaneously amplify dozens of optical channels as they do not convert each channel into electronic signals separately.

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