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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 9 — Apr. 25, 2011
  • pp: 8533–8538

Blind adaptive equalization of polarization-switched QPSK modulation

David S. Millar and Seb J. Savory  »View Author Affiliations


Optics Express, Vol. 19, Issue 9, pp. 8533-8538 (2011)
http://dx.doi.org/10.1364/OE.19.008533


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Abstract

Coherent detection in combination with digital signal processing has recently enabled significant progress in the capacity of optical communications systems. This improvement has enabled detection of optimum constellations for optical signals in four dimensions. In this paper, we propose and investigate an algorithm for the blind adaptive equalization of one such modulation format: polarization-switched quaternary phase shift keying (PS-QPSK). The proposed algorithm, which includes both blind initialization and adaptation of the equalizer, is found to be insensitive to the input polarization state and demonstrates highly robust convergence in the presence of PDL, DGD and polarization rotation.

© 2011 OSA

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4080) Fiber optics and optical communications : Modulation

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: February 24, 2011
Revised Manuscript: April 4, 2011
Manuscript Accepted: April 12, 2011
Published: April 18, 2011

Citation
David S. Millar and Seb J. Savory, "Blind adaptive equalization of polarization-switched QPSK modulation," Opt. Express 19, 8533-8538 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-9-8533


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