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How to Use a Low-cost DFB Local Oscillator in Ultra-long-haul Uncompensated Coherent Systems

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Abstract

The effectiveness of digital coherence enhancement (DCE) for ultra-long-haul uncompensated coherent transmission is experimentally demonstrated. The maximum reach of a 100 Gb/s DP-QPSK system with a low-cost DFB local oscillator is increased from 1600 to 4400 km by DCE, equaling the maximum reach of a narrow-linewidth ECL local oscillator.

© 2012 Optical Society of America

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