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Beyond amplitude-only detection for digital coherent system using directly modulated laser

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Abstract

We report the first experiment of digital coherent detection of directly modulated signals that utilizes both phase and amplitude of the signals. A novel algorithm is proposed to take advantage of simultaneous detection of both phase and amplitude of the modulated signal. Using our proposed scheme, the experiment shows 6-dB improvement over the amplitude-only detection scheme.

© 2015 Optical Society of America

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