Interaction of self-trapped beams in high index glass

Abstract

We observe attraction, repulsion and energy exchange between two self-trapped beams in a heavy-metal-oxide glass exhibiting a Kerr-like response with multiphoton absorption. The coherent interaction between spatial solitons is controlled by their relative phase and modelled by a nonlinear dissipative Schrödinger equation.

Saturation of the filament density of ultrashort intense laser pulses in air

“…This cross-section corresponds to millimeter-range spacing between filaments, under which neighboring optical cells weakly interact. The mutual attraction of filaments located a few mm apart has already been well described [20][21][22][23][24][25]. In our experiments, since we did not focus the beam, neighboring filaments can be expected to emerge in phase since they are issued from the same beam, so that interactions will be mainly attractive.…”

Measurements of the third- and fifth-order optical nonlinearities of water at 532 and 1064 nm using the D4σ method

“…High-order optical nonlinearities (HON) in gases and condensed matter are still deserving investigations from the fundamental point of view [1][2][3][4] as well as because of their important role in phenomena such as soliton formation [5,6], filamentation in gases [7], supercontinuum generation [8], and other transverse nonlinear (NL) effects [9][10][11]. In particular, in the regime of high laser intensity, the investigation of self-focusing of light in transparent materials is important to understand light filamentation in condensed matter that occur without destruction of the material being investigated.…”

Spin-Glass Model Governs Laser Multiple Filamentation

“…Neglecting the last nearestneighbour coupling in equation (9), we find that like for the NLSE, the plane-wave defined by the homogeneous amplitude A = A * and phase φ * = φ + A * 2 t is a steadystate solution. Furthermore, linearizing the system (24)- (25) and considering the first-order corrections of δA and δφ yields, in the Fourier space,…”