Dynamics of optomechanical spatial solitons in dual-nanoweb structures

We theoretically investigate the stability and dynamics of self-channeled beams that form via nonlocal optomechanical interactions in dual-nanoweb microstructured fibers. These beams represent a class of spatial soliton.

Figure 1

Sketch of the geometry. The waveguide is formed by two parallel air-clad silica webs of thickness $w$ spaced a distance $h$ apart. The width of the waveguide is $L_F$. and the radiation-induced deflection of one slab is denoted as δ($X$).

Figure 2

(a) MI gain vs wave number for various powers (${\sigma }^2$ $=$ 10). (b) Maximum MI gain plotted versus the degree of nonlocality (input intensity η${}_0^2$ $=$ 10).

Figure 3

Soliton profiles after equations: (a) intensity $a^2$, (b) deformation φ, and (c) deformation χ for increasing ${\sigma }^2$ (10 ≤ ${\sigma }^2$ ≤ 80, β $=$ 1). Dashed red line represents the Green's function $G$($x$)/$G$(0) after Eq. (9).

Figure 4

Propagation of Gaussian beam $\eta ={\eta }_0\exp (-x^2/2)$ for (a) ${\eta }_0=10$ and (b) ${\eta }_0=100$ when σ $=$ 10.

Figure 5

(a) Output waist after the propagation $z$ $=$ 3 and (b) output peak intensity versus input peak intensity for σ $=$ 5 (continuous line) and σ $=$ 10 (dashed line), with input beam profile $\eta ={\eta }_0\exp (-x^2/2)$, after Eq. (20).