ADC bandwidth optimization in coherent optical polarization multiplexing quadrature phase-shift keying system

S. Zhang, J. Chen, Changyuan Yu, W. Rong, P. Y. Kam

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

2 Citations (Scopus)


Numerical simulations were conducted to study the performance of a 112Gbit/s coherent polarization multiplexing (PolMux) quadrature phase-shift keying (QPSK) system. We addressed the bit resolution, bandwidth of analog-to-digital converters (ADC) in the presence of all chromatic dispersion, polarization- mode dispersion and imperfect laser frequency offset. Both return-to-zero (RZ) and non-return-to-zero (NRZ) QPSK waveforms are taken into account, while the filter type of ADC is assumed to have a Gaussian frequency response. An ADC with 6-bit resolution is found to be sufficient for 112Gbit/s PolMux QPSK transmission. And simulation results show that the ratio of optimum bandwidth of ADC to symbol rate is 0.5 for both RZ- and NRZ-QPSK formats when the lst-order Gaussian frequency response of ADCs is assumed.
Original languageEnglish
Title of host publicationOptical Transmission Systems, Switching, and Subsystems VII
Publication statusPublished - 1 Dec 2009
Externally publishedYes
EventOptical Transmission Systems, Switching, and Subsystems VII - Shanghai, China
Duration: 2 Nov 20096 Nov 2009


ConferenceOptical Transmission Systems, Switching, and Subsystems VII


  • Analog-to-digital converter
  • Bandwidth optimization
  • Bit resolution
  • Coherent optical communication
  • Phase modulation
  • Polarization multiplexing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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