Improving the Achievable Rates of Optical Coherent Transmission with Back-Propagation
Artikel i vetenskaplig tidskrift, 2018

The power allocation in wavelength-division multi- plexed (WDM) fiber-optic links with digital back-propagation (BP) is optimized in order to improve the achievable rates (AR). The power allocation is performed using a convex optimization technique based on a modulation-format-dependent time-domain model capable of including the nonlinear Kerr effects. In a fully loaded WDM link with heterogeneous (uneven) nonlinear interference noise (NLIN) spectrum, the AR gain of nonlinear BP over linear electronic dispersion compensation is 60% larger if per-channel power optimization is allowed than if all transceivers use an equal (flat) optimized power. The heterogeneous NLIN spectrum results from performing BP on a subset of the channels. However, the gain of per-channel power optimization disappears for the homogeneous (nearly flat) NLIN spectrum. Moreover, we show that the improvement obtained by joint channel power allocation is more pronounced for links with a larger number of spans.

time-domain nonlinear noise model

Gaussian noise nonlinear model

digital back-propagation

convex power optimization

Optical coherent communications


Hami Rabbani

K. N. Toosi University of Technology

Hamed Rabbani


Lotfollah Beygi

K. N. Toosi University of Technology

Erik Agrell

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

IEEE Photonics Technology Letters

1041-1135 (ISSN)

Vol. 30 14 1273-1276




Annan elektroteknik och elektronik



Mer information

Senast uppdaterat