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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 12,
  • Issue 8,
  • pp. 081402-
  • (2014)

All-optical clock recovery for 40 Gbaud NRZ-QPSK signals using amplif ied feedback DFB laser diode

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Abstract

An all-optical clock recovery scheme based on monolithic amplified feedback DFB laser (AFL) diode is proposed for nonreturn-to-zero (NRZ) quadrature phase shift keying (QPSK) format signals. By using a preprocessing stage, clock recovery (CR) is successfully demonstrated for 40-Gbaud NRZ-QPSK signals based on this scheme. The dependence of the timing jitter of the recovered clock on the optical power of the injected signal is investigated. A minimum timing jitter of 362.8 fs (integrated within a frequency range from 10 Hz to 10 MHz) is obtained.

© 2014 Chinese Optics Letters

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