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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 27 — Dec. 19, 2011
  • pp: 26594–26599

Feed-forward true carrier extraction of high baud rate phase shift keyed signals using photonic modulation stripping and low-bandwidth electronics

Radan Slavík, Joseph Kakande, and David J. Richardson  »View Author Affiliations


Optics Express, Vol. 19, Issue 27, pp. 26594-26599 (2011)
http://dx.doi.org/10.1364/OE.19.026594


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Abstract

Retrieving the full information carried by phase shift keyed (PSK) data streams requires a reference local oscillator (LO). If the receiver utilizes digital signal processing (DSP), a free-running LO can be used, although several benefits can be derived from generating an optical LO that is locked in frequency and phase to the original signal carrier (which is unfortunately suppressed in the PSK data modulation process). Here, we present a new concept of carrier recovery. Using nonlinear optics, we strip the data modulation and derive an error signal proportional to the phase/frequency difference between a free running intradyne LO and the data-stripped signal. After extracting this frequency difference (using slow electronics), we frequency shift the free running LO by this amount, effectively obtaining a homodyne LO. The carrier is recovered to a precision of better than ±0.5 Hz and the method is tested by performing homodyne detection of a 20 Gbaud binary PSK signal.

© 2011 OSA

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(070.4340) Fourier optics and signal processing : Nonlinear optical signal processing

ToC Category:
Subsystems for Optical Networks

History
Original Manuscript: October 3, 2011
Revised Manuscript: October 30, 2011
Manuscript Accepted: November 2, 2011
Published: December 14, 2011

Virtual Issues
European Conference on Optical Communication 2011 (2011) Optics Express

Citation
Radan Slavík, Joseph Kakande, and David J. Richardson, "Feed-forward true carrier extraction of high baud rate phase shift keyed signals using photonic modulation stripping and low-bandwidth electronics," Opt. Express 19, 26594-26599 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-27-26594


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References

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