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A High-sensitivity Coherent Receiver without Frequency Recovery Enabled by Doubly Differential QPSK

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A high-sensitivity coherent receiver with reduced complexity and high frequency offset tolerance was numerically demonstrated using doubly differential QPSK (DDQPSK). The sensitivity for the 134-Gb/s coherent system transmission over 80-km SMF was below -27.5 dBm.

© 2017 Optical Society of America

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