23 citations · 77 across the 15 of their papers we have counts for
12 papers · 1 filter
Modulational instability in -symmetric Bragg grating structures with four-wave mixing
I. Inbavalli, K. Tamilselvan, A. Govindarajan +2
We investigate the dynamics of modulational instability (MI) in -symmetric fiber Bragg gratings with a phenomenon of intermodulation known as four-wave mixing (FWM). Altho…
Unique multistable states in periodic structures with saturable nonlinearity
S. Vignesh Raja, A. Govindarajan, M. Lakshmanan
We report that conventional saturable periodic structures, in sharp contrast to the conventional systems with different nonlinearities which exhibit the typical S- shaped optical b…
Unique multistable states in periodic structures with saturable nonlinearity. II. Broken -symmetric regime
S. Vignesh Raja, A. Govindarajan, M. Lakshmanan
In this work, we observe that the -symmetric fiber Bragg gratings (PTFBGs) with saturable nonlinearity (SNL) exhibit ramp-like, mixed, optical multistability (OM) in…
Unique multistable states in periodic structures with saturable nonlinearity. I. Conventional case and unbroken -symmetric regime
S. Vignesh Raja, A. Govindarajan, M. Lakshmanan
In this work, we predict that periodic structures without gain and loss do not exhibit an S-shaped hysteresis curve in the presence of saturable nonlinearity (SNL). Instead, the in…
Stabilization of light bullets in nonlinear metamaterial waveguides
A. K. Shafeeque Ali, A. Govindarajan, M. Lakshmanan
In this paper, we carry out a theoretical investigation on the propagation of spatio-temporal solitons (light bullets) in the nonlinear metamaterial waveguides. Our theoretical stu…
Low-power optical bistability in -symmetric chirped Bragg gratings with four-wave mixing
S. Sudhakar, S. Vignesh Raja, A. Govindarajan +2
The central theme of this article is the analysis of the usefulness of introducing four-wave mixing or modulation of Kerr nonlinearity in a nonuniform grating structure with gain a…