A Raman amplifier is an optical amplifier that utilizes the Raman scattering effect to amplify light signals in fiber optic communication systems. By introducing a pump laser at a different wavelength, it enables the transfer of energy to the signal wave, resulting in increased signal power without significant distortion. This technology is crucial for enhancing the capacity and reach of wavelength division multiplexed (WDM) systems, allowing multiple signals to be transmitted simultaneously over a single fiber.
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