  The idea of asymmetric light transmission through a photonic crystal with
relaxing Kerr nonlinearity is presented. This idea is based on the symmetry
breaking due to the self-trapping of intensive pump pulse inside the structure.
As a result, the asymmetric transmission of the secondary (probe) pulses
through the perturbed photonic crystal can be observed. The cases of short and
long (quasi-continuous) probe pulses are considered.
