Strong effects of fast collisions between pulsed optical beams in a linear medium with weak cubic loss

We investigate fast collisions between pulsed optical beams in a linear medium with weak cubic loss that arises due to nondegenerate two-photon absorption. introduce perturbation method two small parameters and use it obtain general formulas for the collision-induced changes pulsed-beam's shape amplitude. Moreover, we design characterize collision setups lead strong localized nonlocalized intensity reduction effects. The values of both are larger by one orders magnitude compared obtained previous studies two-pulse collisions. Furthermore, show setups, graph amplitude shift vs difference first-order dispersion coefficients pulsed-beams has local minima. This finding represents first observation deviation from common funnel was all presence nonlinear loss. predictions our theory good agreement results numerical simulations perturbed propagation model, despite Our can be useful multisequence communication links reshaping beams.