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

S. Zhang; J. Chen; C. Yu; W. Rong; P. Y. Kam

doi:10.1117/12.852087

1 December 2009 ADC bandwidth optimization in coherent optical polarization multiplexing quadrature phase-shift keying system

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

Author Affiliations +

Proceedings Volume 7632, Optical Transmission Systems, Switching, and Subsystems VII; 76321F (2009) https://doi.org/10.1117/12.852087
Event: Asia Communications and Photonics, 2009, Shanghai, Shanghai , China

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.

Citation Download Citation

S. Zhang, J. Chen, C. Yu, W. Rong, and P. Y. Kam "ADC bandwidth optimization in coherent optical polarization multiplexing quadrature phase-shift keying system", Proc. SPIE 7632, Optical Transmission Systems, Switching, and Subsystems VII, 76321F (1 December 2009); https://doi.org/10.1117/12.852087

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