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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 26 — Dec. 12, 2011
  • pp: B770–B776

Burst Mode Receiver for 112 Gb/s DP-QPSK with parallel DSP

Benn C. Thomsen, Robert Maher, David S. Millar, and Seb J. Savory  »View Author Affiliations


Optics Express, Vol. 19, Issue 26, pp. B770-B776 (2011)
http://dx.doi.org/10.1364/OE.19.00B770


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Abstract

A burst mode 112Gb/s DP-QPSK digital coherent optical receiver with parallel DSP suitable for implementation in a CMOS ASIC with a 218.75 MHz clock speed is presented. The receiver performance is validated in a five channel 50 GHz grid WDM burst switching experiment using a commercially available wavelength tunable laser as the local oscillator. A new equalizer initialization scheme that overcomes the degenerate convergence problem and ensures rapid convergence is introduced. We show that the performance of the tunable local oscillator is commensurate with burst mode coherent reception when differential decoding in employed and that required parallel DSP implementation does not seriously impair the polarization and frequency tracking performance of a digital coherent receiver under burst mode operation. We report a burst acquisition time of less than 200 ns.

© 2011 OSA

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(060.4259) Fiber optics and optical communications : Networks, packet-switched

ToC Category:
Subsystems for Optical Networks

History
Original Manuscript: October 3, 2011
Manuscript Accepted: November 12, 2011
Published: December 6, 2011

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

Citation
Benn C. Thomsen, Robert Maher, David S. Millar, and Seb J. Savory, "Burst Mode Receiver for 112 Gb/s DP-QPSK with parallel DSP," Opt. Express 19, B770-B776 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-26-B770


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References

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