Sign ambiguity of accumulated chromatic dispersion estimated from intensity waveforms in a fiber optic communications link

摘要

The paper discusses uncertainty in estimation of sign of accumulated chromatic dispersion in an optical fibercommunication link where the estimation is based on fitting a model of chromatic dispersion affected optical intensitywaveforms to intensity measurement data. The uncertainty is characterized by probability of false readout ofaccumulated chromatic dispersion sign. Through extensive computations it is shown that despite the sign estimation inthe method in question is in general ambiguous the chance for erroneous readout can be engineered to a desired levelprovided certain conditions are met. For the purpose of the characterization a theoretical model of sign false readout wasdeveloped and validated through combined measurements and simulations.