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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 38, Iss. 13 — Jul. 1, 2013
  • pp: 2271–2273

Coherent correlator and equalizer using a reconfigurable all-optical tapped delay line

Mohammad Reza Chitgarha, Salman Khaleghi, Omer F. Yilmaz, Moshe Tur, Michael W. Haney, Carsten Langrock, Martin M. Fejer, and Alan E. Willner  »View Author Affiliations


Optics Letters, Vol. 38, Issue 13, pp. 2271-2273 (2013)
http://dx.doi.org/10.1364/OL.38.002271


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Abstract

We experimentally demonstrate a reconfigurable optical tapped delay line in conjunction with coherent detection to search multiple patterns among quadrature phase shift keying (QPSK) symbols in 20 Gbaud data channel and also to equalize 20 and 31 Gbaud QPSK, 20 Gbaud 8 phase shift keying (PSK), and 16 QAM signals. Multiple patterns are searched successfully on QPSK signals, and correlation peaks are obtained at the matched patterns. QPSK, 8 PSK, and 16 QAM signals are also successfully recovered after 25 km of SMF-28 with average EVMs of 8.3%, 8.9%, and 7.8%. A penalty of <1dB optical signal to noise penalty is achieved for a 20 Gbaud QPSK signal distorted by up to 400ps/nm dispersion.

© 2013 Optical Society of America

OCIS Codes
(060.2360) Fiber optics and optical communications : Fiber optics links and subsystems
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(190.4223) Nonlinear optics : Nonlinear wave mixing

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: March 11, 2013
Revised Manuscript: May 30, 2013
Manuscript Accepted: May 31, 2013
Published: June 25, 2013

Citation
Mohammad Reza Chitgarha, Salman Khaleghi, Omer F. Yilmaz, Moshe Tur, Michael W. Haney, Carsten Langrock, Martin M. Fejer, and Alan E. Willner, "Coherent correlator and equalizer using a reconfigurable all-optical tapped delay line," Opt. Lett. 38, 2271-2273 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-13-2271


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