scholarly journals Spatial soliton dynamics in cubic-quintic media

2013 ◽  
Author(s):  
Nuno A. Silva ◽  
M. I. Carvalho ◽  
A. Guerreiro
Keyword(s):  
Spatial Soliton ◽  
Soliton Dynamics

Spatial solitons in a medium with lumped amplification and dissipation

2015 ◽  
Vol 24 (01) ◽  
pp. 1550011 ◽  
Author(s):  
K. Aysha Muhsina ◽  
P. A. Subha
Keyword(s):  
Propagation Distance ◽  
Spatial Soliton ◽  
Amplification Coefficient ◽  
Kerr Medium ◽  
Two Dimensional ◽  
Spatial Solitons ◽  
Linear Amplification ◽  
Graded Index ◽  
Kerr Media ◽  
Soliton Dynamics

This work analyzes the dynamics of two-dimensional spatial solitons in dissipative graded index Kerr media, analytically and numerically. The dynamics of two-dimensional spatial solitons has been studied in a medium with lumped amplification. The presence of lumped amplification in the medium results in the formation of soliton like waves called similaritons. The spatial soliton dynamics has been studied in a dissipative medium. In a dissipative graded index Kerr medium, the balancing between the coefficients of constant dissipation and lumped amplification results in the stabilization of the beam. The beam dynamics has also been studied by varying amplification coefficients with propagation distance. Hyperbolic, linear, and exponential amplification profiles are considered. When amplification coefficient varies with propagation distance, the beam gets compressed. The beam compression is higher in the case of exponential amplification profile than that of hyperbolic and linear amplification profiles.

scholarly journals Red Solitons: Evidence of Spatiotemporal Instability inχ(2)Spatial Soliton Dynamics

2003 ◽  
Vol 91 (12) ◽  
Author(s):  
Stefano Minardi ◽  
Jin Yu ◽  
Giovanni Blasi ◽  
Arunas Varanavičius ◽  
Gintaras Valiulis ◽  
...  
Keyword(s):  
Spatial Soliton ◽  
Soliton Dynamics ◽  
Spatiotemporal Instability

scholarly journals Dynamics of carbon nanotube-based mode-locking fiber lasers

Nanophotonics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 2731-2761 ◽  
Author(s):  
Lin Huang ◽  
Yusheng Zhang ◽  
Xueming Liu
Keyword(s):  
Carbon Nanotube ◽  
Fiber Lasers ◽  
Modulation Depth ◽  
Laser System ◽  
Physical Nature ◽  
Mode Locking ◽  
Environmental Stability ◽  
Saturation Intensity ◽  
Soliton Dynamics ◽  
Deep Modulation

AbstractCarbon nanotube (CNT) can work as excellent saturable absorber (SA) due to its advantages of fast recovery, low saturation intensity, polarization insensitivity, deep modulation depth, broad operation bandwidth, outstanding environmental stability, and affordable fabrication. Its successful application as SA has promoted the development of scientific research and practical application of mode-locked fiber lasers. Besides, mode-locked fiber laser constitutes an ideal platform for investigating soliton dynamics which exhibit profound nonlinear optical dynamics and excitation ubiquitous in many fields. Up to now, a variety of soliton dynamics have been observed. Among these researches, CNT-SA is a key component that suppresses the environmental perturbation and optimizes the laser system to reveal the true highly stochastic and non-repetitive unstable phenomena of the initial self-starting lasing process. This review is intended to provide an up-to-date introduction to the development of CNT-SA based ultrafast fiber lasers, with emphasis on recent progress in real-time buildup dynamics of solitons in CNT-SA mode-locked fiber lasers. It is anticipated that study of dynamics of solitons can not only further reveal the physical nature of solitons, but also optimize the performance of ultrafast fiber lasers and eventually expand their applications in different fields.

scholarly journals Theory of the deformation of aligned polyethylene

2015 ◽  
Vol 471 (2180) ◽  
pp. 20150171 ◽  
Author(s):  
A. Hammad ◽  
T. D. Swinburne ◽  
H. Hasan ◽  
S. Del Rosso ◽  
L. Iannucci ◽  
...  
Keyword(s):  
Load Transfer ◽  
Tensile Load ◽  
Equation Of Motion ◽  
Dislocation Dynamics ◽  
Viscoelastic Deformation ◽  
Transfer Length ◽  
Soliton Dynamics ◽  
Fluctuation Dissipation ◽  
Pull Out ◽  
Definition Of

Solitons are proposed as the agents of plastic and viscoelastic deformation in aligned polyethylene. Interactions between straight, parallel molecules are mapped rigorously onto the Frenkel–Kontorova model. It is shown that these molecular interactions distribute an applied load between molecules, with a characteristic transfer length equal to the soliton width. Load transfer leads to the introduction of tensile and compressive solitons at the chain ends to mark the onset of plasticity at a well-defined yield stress, which is much less than the theoretical pull-out stress. Interaction energies between solitons and an equation of motion for solitons are derived. The equation of motion is based on Langevin dynamics and the fluctuation–dissipation theorem and it leads to the rigorous definition of an effective mass for solitons. It forms the basis of a soliton dynamics in direct analogy to dislocation dynamics. Close parallels are drawn between solitons in aligned polymers and dislocations in crystals, including the configurational force on a soliton. The origins of the strain rate and temperature dependencies of the viscoelastic behaviour are discussed in terms of the formation energy of solitons. A failure mechanism is proposed involving soliton condensation under a tensile load.

scholarly journals Wideband Spectral Enhancement through on‐chip Bragg‐Soliton Dynamics

2021 ◽  
pp. 2100107
Author(s):  
Ezgi Sahin ◽  
Andrea Blanco-Redondo ◽  
Byoung-Uk Sohn ◽  
Yanmei Cao ◽  
George F. R. Chen ◽  
...  
Keyword(s):  
Soliton Dynamics ◽  
Spectral Enhancement ◽  
On Chip
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