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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 10 — May. 20, 2013
  • pp: 12351–12362

Study of EEPN mitigation using modified RF pilot and Viterbi-Viterbi based phase noise compensation

Gunnar Jacobsen, Tianhua Xu, Sergei Popov, and Sergey Sergeyev  »View Author Affiliations


Optics Express, Vol. 21, Issue 10, pp. 12351-12362 (2013)
http://dx.doi.org/10.1364/OE.21.012351


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Abstract

We propose – as a modification of the optical (RF) pilot scheme - a balanced phase modulation between two polarizations of the optical signal in order to generate correlated equalization enhanced phase noise (EEPN) contributions in the two polarizations. The method is applicable for n-level PSK system. The EEPN can be compensated, the carrier phase extracted and the nPSK signal regenerated by complex conjugation and multiplication in the receiver. The method is tested by system simulations in a single channel QPSK system at 56 Gb/s system rate. It is found that the conjugation and multiplication scheme in the Rx can mitigate the EEPN to within ½ orders of magnitude. Results are compared to using the Viterbi-Viterbi algorithm to mitigate the EEPN. The latter method improves the sensitivity more than two orders of magnitude. Important novel insight into the statistical properties of EEPN is identified and discussed in the paper.

© 2013 OSA

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(060.2330) Fiber optics and optical communications : Fiber optics communications

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: February 27, 2013
Revised Manuscript: April 5, 2013
Manuscript Accepted: May 8, 2013
Published: May 13, 2013

Citation
Gunnar Jacobsen, Tianhua Xu, Sergei Popov, and Sergey Sergeyev, "Study of EEPN mitigation using modified RF pilot and Viterbi-Viterbi based phase noise compensation," Opt. Express 21, 12351-12362 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-10-12351


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