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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 6 — Mar. 20, 2006
  • pp: 2085–2094

Phase-and-amplitude regeneration of differential phase-shift keyed signals using a phase-sensitive amplifier

Kevin Croussore, Inwoong Kim, Cheolhwan Kim, Yan Han, and Guifang Li  »View Author Affiliations

Optics Express, Vol. 14, Issue 6, pp. 2085-2094 (2006)

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– DPSK phase-and-amplitude regeneration with a NOLM-based phase-sensitive amplifier is demonstrated experimentally. For a highly degraded input signal, maximum differential phase errors were reduced from 82° to 41°, while the SNR was improved by more than 5-dB. Differential phase Q-factor improvement was better than 6-dB. The PSA was operated free of excess noise due to stimulated Brillouin scattering by using a binary phase modulated pulse train as the pump. The impact of pump fluctuations on regeneration performance is clarified. The regenerated signal was characterized by measurement of the constellation diagram by linear optical sampling, giving the first directly measured evidence of DPSK phase regeneration.

© 2006 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(060.4510) Fiber optics and optical communications : Optical communications
(060.5060) Fiber optics and optical communications : Phase modulation
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: January 27, 2006
Revised Manuscript: March 14, 2006
Manuscript Accepted: March 15, 2006
Published: March 20, 2006

Kevin Croussore, Inwoong Kim, Cheolhwan Kim, Yan Han, and Guifang Li, "Phase-and-amplitude regeneration of differential phase-shift keyed signals using a phase-sensitive amplifier," Opt. Express 14, 2085-2094 (2006)

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