Q. Zhang

Publications (5)1.87 Total impact

• Article: Electronic Postcompensation of Fiber Nonlinearity for 40 Gbit∕s WDM Systems

  N. Ahmed, M.I. Hayee, Q. Zhang
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  ABSTRACT: We propose a technique to electronically postcompensate fiber nonlinearity in ≥40 Gbit/s long-haul WDM transmission systems. We have analyzed this technique for return-to-zero and carrier-suppressed return-to-zero modulation formats using two different dispersion maps. Our analysis shows that the proposed technique can increase the overall system margin by more than 1.0 dB in 40 Gbit/s long-haul WDM transmission systems.
  Journal of Optical Communications and Networking 08/2010; · 1.87 Impact Factor
• Conference Proceeding: Computation step-size study in digital post-compensation of fiber optic communication systems

  Q. Zhang, C.R. Menyuk, M.I. Hayee, C. Tavva, H.-W. Huang, R. Nair, M. Khaliq
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  ABSTRACT: After an introduction to the nonlinear fiber transmission and an optimal channel equalization scheme, recently proposed analytical step-size selection and scaling rules was verified to achieve comparable global simulation accuracy for split-step Fourier (SSF) simulations of optical pulse propagation through fiber with low simulation accuracy. Its application to digital post-compensation and its computational performance was systematically studied for return to zero (RZ) and carrier suppressed return to zero (CSRZ) modulation formats with different inline dispersion map degrees.
  Information Sciences and Systems, 2009. CISS 2009. 43rd Annual Conference on; 04/2009
• Conference Proceeding: Computation step-size study in digital post-compensation of fiber optic communication systems.

  Q. Zhang, C. R. Menyuk, M. I. Hayee, C. Tavva, H.-W. Huang, R. Nair, M. Khaliq
  43rd Annual Conference on Information Sciences and Systems, CISS 2009, The John Hopkins University, Baltimore, MD, USA, 18-20 March 2009; 01/2009
• Conference Proceeding: Performance Optimization for 80 Gb/s NRZ-DPSK Transceiver with Pre-Emphasized Electrical Signal Driving Path

  Q. Zhang, A. Rahman, M.A. Khaliq, H.-W. Huang, R. Sultana
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  ABSTRACT: Employing a rigorous KLSE based quasi-analytical method for the BER calculation, we optimize an 80 Gb/s NRZ-DPSK transceiver by pre-emphasizing the high frequency portion of the gain shape of electrical signal driving path.
  IEEE/LEOS Summer Topical Meetings, 2007 Digest of the; 08/2007
• Conference Proceeding: An Exact Analysis of RZ-vs. NRZ-DPSK Performance in ASE Noise Limited High Speed Optical Systems

  Q. Zhang, C.R. Menyuk
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  ABSTRACT: The back-to-back performance of optical RZ-DPSK and NRZ-DPSK formats was compared using KLSE method. The effect of unmatched optical bandpass filter was studied with/without the presence of the electrical low pass filter in the receiver.
  IEEE/LEOS Summer Topical Meetings, 2007 Digest of the; 08/2007