TY  - JOUR
  - Rafique, D,Mussolin, M,Martensson, J,Forzati, M,Fischer, JK,Molle, L,Nolle, M,Schubert, C,Ellis, AD
  - 2011
  - January
  - Optics Express
  - Polarization multiplexed 16QAM transmission employing modified digital back-propagation
  - Validated
  - ()
  - NONLINEARITY COMPENSATION COHERENT SYSTEMS
  - 19
  - 805
  - 810
  - We experimentally demonstrate performance enhancements enabled by weighted digital back propagation method for 28 Gbaud PM-16QAM transmission systems, over a 250 km ultra-large area fibre, using only one back-propagation step for the entire link, enabling up to 3 dB improvement in power tolerance with respect to linear compensation only. We observe that this is roughly the same improvement that can be obtained with the conventional, computationally heavy, non-weighted digital back propagation compensation with one step per span. As a further benchmark, we analyze performance improvement as a function of number of steps, and show that the performance improvement saturates at approximately 20 steps per span, at which a 5 dB improvement in power tolerance is obtained with respect to linear compensation only. Furthermore, we show that coarse-step self-phase modulation compensation is inefficient in wavelength division multiplexed transmission. (C) 2011 Optical Society of America
DA  - 2011/01
ER  - 

@article{V160748333,
   = {Rafique,  D and Mussolin,  M and Martensson,  J and Forzati,  M and Fischer,  JK and Molle,  L and Nolle,  M and Schubert,  C and Ellis,  AD },
   = {2011},
   = {January},
   = {Optics Express},
   = {Polarization multiplexed 16QAM transmission employing modified digital back-propagation},
   = {Validated},
   = {()},
   = {NONLINEARITY COMPENSATION COHERENT SYSTEMS},
   = {19},
  pages = {805--810},
   = {{We experimentally demonstrate performance enhancements enabled by weighted digital back propagation method for 28 Gbaud PM-16QAM transmission systems, over a 250 km ultra-large area fibre, using only one back-propagation step for the entire link, enabling up to 3 dB improvement in power tolerance with respect to linear compensation only. We observe that this is roughly the same improvement that can be obtained with the conventional, computationally heavy, non-weighted digital back propagation compensation with one step per span. As a further benchmark, we analyze performance improvement as a function of number of steps, and show that the performance improvement saturates at approximately 20 steps per span, at which a 5 dB improvement in power tolerance is obtained with respect to linear compensation only. Furthermore, we show that coarse-step self-phase modulation compensation is inefficient in wavelength division multiplexed transmission. (C) 2011 Optical Society of America}},
  source = {IRIS}
}