Fiber nonlinearity mitigation using strong mode coupling and large modal delay
Aspects of the present disclosure describe fiber nonlinearity induced transmission penalties are reduced both in fibers with large polarization-mode dispersion, and in coupled-core multicore fibers (CC-MCF). In the case of coupled multi-core fibers, the requirement for modal delay is less.
1. A method for reducing impairments arising from fiber nonlinearity comprising:
providing a fiber exhibiting a large differential group delay (DGD);
adjusting the DGD such that the DGD is sufficiently large that any average spreading from the DGD is substantially equal to spreading resulting from chromatic dispersion (CD).
2. A method for reducing impairments arising from fiber nonlinearity comprising:
providing a fiber having multiple cores that are strongly coupled such that signals carried in the multiple cores mix frequently and continuously;
wherein the length at which the signals carried in the multiple cores is less than the length at which any impairments from fiber nonlinearities become noticeable;
wherein a group velocity in the individual, multiple cores are different, such that an increased mode group delay (MGD) results.