Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 23, Issue 19, Pages 1412-1414Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2011.2162229
Keywords
Backward propagation; coherent detection; digital postcompensation; Volterra series transfer function
Funding
- PT Inovacao, SA
- European Union within the EURO-FOS
- EU
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We propose a noniterative digital backward propagation technique, based on an inverse modified Volterra series transfer function to postcompensate transmission linear and nonlinear impairments in the presence of optical noise. Using a single-channel 40-Gb/s nonreturn-to-zero quadrature phase-shift-keying optical signal propagated over 20 x 80 km of standard single-mode fiber, and performing digital postcompensation around the Nyquist rate, our compensation algorithm is able to surpass the maximum accuracy obtained with a symmetric split-step Fourier method, enabling us to increase the nonlinear tolerance by approximately 2 dB.
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