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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 9,
  • Issue 10,
  • pp. 100607-
  • (2011)

160-Gb/s polarization-multiplexing optical NRZ-DQPSK transmission using differential detection

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Abstract

Using differential detection, we perform polarization-multiplexing 160-Gb/s optical non-return-to-zero (NRZ) differential quadrature phase shift keying (DQPSK) signal transmission over 100-km standard single mode fiber at a bit error rate (BER) of less than 10-9. The enabling technology includes clock recovery, fine dispersion compensation, and polarization tracking for de-multiplexing. Furthermore, a hybrid clock recovery scheme is proposed. The scheme is realized with ordinary devices using an optoelectrical modulator to down-convert the clock frequency and a phase-locked loop for filtering, which can provide an indication signal that simultaneously monitors residual dispersion and tracking polarization.

© 2011 Chinese Optics Letters

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