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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 21, Iss. 9 — Sep. 1, 2003
  • pp: 1887–

Robustness to Laser Frequency Offset in Direct-Detection DPSK and DQPSK Systems

Hoon Kim and Peter J. Winzer

Journal of Lightwave Technology, Vol. 21, Issue 9, pp. 1887- (2003)


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Abstract

We assess, both by measurement and simulation, the receiver performance degradation caused by frequency offsets between the optical source and the delay interferometer for nonreturn-to-zero (NRZ) and return-to-zero (RZ) differential-phase-shift-keying (DPSK) and differential-quadrature-phase-shift-keying (DQPSK) systems. We find that NRZ-and RZ-DQPSK systems are about six times more sensitive to frequency offsets than NRZ-and RZ-DPSK systems operating at the same bit rate. We explain the reason for this behavior by means of eye aperture considerations.

© 2003 IEEE

Citation
Hoon Kim and Peter J. Winzer, "Robustness to Laser Frequency Offset in Direct-Detection DPSK and DQPSK Systems," J. Lightwave Technol. 21, 1887- (2003)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-21-9-1887

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