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Proceedings Paper

ADC bandwidth optimization in coherent optical polarization multiplexing quadrature phase-shift keying system
Author(s): S. Zhang; J. Chen; C. Yu; W. Rong; P. Y. Kam
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Paper Abstract

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 1st-order Gaussian frequency response of ADCs is assumed.

Paper Details

Date Published: 1 December 2009
PDF: 6 pages
Proc. SPIE 7632, Optical Transmission Systems, Switching, and Subsystems VII, 76321F (1 December 2009); doi: 10.1117/12.852087
Show Author Affiliations
S. Zhang, National Univ. of Singapore (Singapore)
J. Chen, A*STAR Institute for Infocomm Research (Singapore)
C. Yu, National Univ. of Singapore (Singapore)
A*STAR Institute for Infocomm Research (Singapore)
W. Rong, A*STAR Institute for Infocomm Research (Singapore)
P. Y. Kam, National Univ. of Singapore (Singapore)


Published in SPIE Proceedings Vol. 7632:
Optical Transmission Systems, Switching, and Subsystems VII
Dominique Chiaroni, Editor(s)

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