The dynamics of finite energy Airy beams modeled by the fractional Schrödinger equation (FSE) with a linear potential are numerically investigated. Different from propagation properties described standard equation, splitting phenomenon, which is presented under FSE without potential, influenced quadratic chirp and Lévy index. As considered, periodic evolution shown, period inversely proportional to coefficient. beam width can undergo an abrupt decrease or increase depending on sign deviation...

The dynamics of Airy beams modeled by the fractional Schrodinger equation (FSE) with potential barrier are numerically investigated. Adjusting Levy index provides a convenient way to control diffraction which presents non-diffraction and splitting property. It has been found that total reflection occurs when depth single exceeds threshold, number reflected waves is influenced location barrier. However, periodic self-imaging phenomenon shown under symmetric equal one, period asymmetric...

In this Letter, we demonstrate the existence of multiple equilibrium states in pure-quartic soliton (PQS) molecules. A discrete sequence separations alternating between stable and unstable is theoretically predicted numerically identified PQS doublet triplet states. Furthermore, a systematic family tree bound PQSs constructed to facilitate understanding hierarchical structure stationary molecules, thus allowing for on-demand mixture arbitrary orders relative phase (in- or anti-phase)...

Based on the extended Huygens-Fresnel principle, we have derived analytical expression of average intensity optical coherence lattices (OCLs) in oceanic turbulence with anisotropy, and then beam quality parameters including Strehl ratio (SR) power-in-the-bucket (PIB) are obtained. One can find that OCLs will eventually evolve into Gaussian shape periodicity reciprocity gradually breaking down when propagating through anisotropic ocean water, trend evolving be accelerated for increasing...

We have numerically investigated the propagation properties of ring Airy beams modeled by a fractional Schrödinger equation (FSE). Beam splitting is exhibited and clarified from view group delay. Compared with case condition in free space, focal intensity greatly enhanced presents trend increasing to decreasing decrement Lévy index, while length largely increases; addition, parabolic trajectory distorted Bessel pattern gradually disappearing. However, both its get decreased due absence...

We investigate the propagation dynamics of soliton-sinc, a kind novel hybrid pulse, in presence higher-order effects with emphasis on third-order dispersion (TOD) and Raman effects. At variance fundamental sech soliton, traits band-limited soliton-sinc pulse can effectively manipulate radiation process dispersive waves (DWs) induced by TOD. The energy enhancement radiated frequency tunability strongly depend parameter. A modified phase-matching condition is proposed for predicting resonant...

We have numerically studied the effect of mutual interactions between soliton and dispersive waves possibility to create a solitonic well consisting initial twin-solitons moving away from each other trap incident wave. Different case cage formed by velocity-matched twin-solitons, intense wave can break up into small pulses, which are almost completely trapped within well. Moreover, corresponding spectrum be narrowed firstly then expanded, new generated as collision occurred. By adjusting...

Breathing solitons, as localized wave packets with a periodic evolution in amplitude and duration, are able to model extreme events complex nonlinear dispersive systems. We have numerically studied the formation manipulation of graded-index breathing solitons embedded multimode fibers based on single Schrödinger equation that includes spatial self-imaging effect through periodically varying parameter. Through changing specific parameters input optical field, we can manipulate period depth...

We show that the group-velocity-led optical event horizon (OEH) in fibers provides a convenient way to actively control propagation property of higher-order solitons by comparatively weak dispersive wave (DW) pulse.It has been found numerically clean soliton breakup, process which second-order completely splits into pair constituent with vastly different power proportions after interacting DW pulse, will occur while external DWs become polychromatic.The temporal separation between both can...

A novel h-shaped pulse train with a tunable leading-edge (resembling merging weak square pulse) is experimentally generated in Tm-doped mode-locked fiber laser (MLFL) incorporating 100 m highly nonlinear fiber. Through carefully adjusting the pump power and cavity polarization states, duration of obtained can be widely tuned from zero (corresponding to typical conventional train) 567.8 ns (equivalent roundtrip time). Our results further facilitate understanding intrinsic mechanism...

The controlling optical frequency in the regime of an event horizon by collision between a soliton and probe pulse is investigated, process which converted into generated (idler) with new reversible. For two cases wave interacts bright/dark soliton, unified analytical formula governing reversible conversion derived that can predict idler very well. This frequency-conversion validated cascaded four-wave mixing (FWM) triggered set quasi-CW fields, strongly suggesting arose from Bragg...

Generalized quartic dispersion Kerr solitons (GQKSs) represent a unique soliton family, which are solutions to the generalized Schrödinger equation with interplay between nonlinearity and combination of quadratic dispersions. The well-known pure (PQSs) exactly within special case this occurring in presence negative quartic-only dispersion. Here, we report on first experimental generation GQKSs from fiber laser investigate their temporal spectral characteristics. We find that features closely...

Abstract The ability to actively control broadband light absorption and reflection ranging from deep‐ultraviolet (DUV) near‐infrared (NIR), is crucial for various optical optoelectronic applications. Herein, a novel type of ultrathin, lithography‐free, aperiodic thin‐film metamaterial coatings (metacoatings) inverse‐designed DUV NIR (190–1700 nm), which composed series deeply subwavelength tungsten oxide layers with graded refractive index profiles (by varying the deposited Ar gas pressures...

Abstract We studied numerically the enhanced optical transmission (EOT) through periodic subwavelength circular‐sharp hole arrays in metallic films with different edge sharp distribution features of unit structures. Detailed studies indicate that structure strongly influence surface plasmons (SPs). These results demonstrate number activated localized plamons (LSP) resonance on is changed by rotating polarization incident light, leading to change infrared transmittance array. Moreover, a...

In this paper, we illustrate how the periodically modulated nonlinear parameter induced by spatial beam oscillation can be used to generate broadband resonant radiations, through a train of dark pulses in normally dispersive graded-index multimode fibers under efficient quasi-phase-matching schemes. More precisely, demonstrate that two co-propagating waves with equal intensities and certain temporal delays induce formation solitons, each emitting multiple radiation lines, which possibly form...

Abstract A stabilization scheme is proposed for the dynamics of breather waves induced by coherent-seed modulation instability based on manipulation phase-space trajectory. Theoretical and numerical analysis show that carefully dispersion- nonlinearity-managed cascades fiber configuration allows system evolution to be stabilized around an elliptic center point, forming stable pulse trains with ultrahigh contrast efficiently. We also demonstrate works equally well near-separatrix dynamics....

We demonstrate that the optical event horizon can provide an effective technique to actively control propagation properties of a dark soliton with another weak probe wave. Careful power adjustment wave enables black converted into gray one varying grayness through nonlinear interaction, corresponding nearly adiabatic variation soliton's speed. The sign phase angle for newly formed at is significantly dependent on frequency launched Linear-stability analysis solitons under perturbation...

The evolution of the ring Airy Gaussian beams with a modulated vortex in free space is numerically investigated. Compared unmodulated vortex, unique property that beam spots first break up, and then gather. influenced by parameters modulation, splitting phenomenon gets enhanced multiple rings becoming light if modulation depth increases. symmetric branch pattern changed when number phase folds increases, initial only impacts angle spots. Moreover, large distribution factor correlates to...

We propose a manipulation approach to vary the wave speed, as well grayness, of dark solitons under optical event horizon arising from interaction between soliton and probe wave. To best our knowledge, effect is demonstrated for first time be capable inducing reversible conversion black gray one. This transformation control process originates intrinsic competition probe-induced nonlinear phase shift internal soliton. In cascaded system consisting two horizons, we also observe new tunneling...

Introduction: POLD2 is an indispensable subunit of DNA polymerase δ, which responsible for the synthesis backward accompanying strand in eukaryotic organisms. Current studies have found association between and development a variety cancers. However, its value cancer immunotherapy has not been fully established. Methods: expression was analyzed using RNA clinical data from TCGA GTEx databases. The prognostic impact on tumor patients survival TCGA. Gene enrichment analysis performed R package...

We investigate the propagation dynamics of Peregrine soliton, a significant prototype rogue waves, within graded-index multimode fibers, in absence higher-order dispersion. The soliton keeps approximate evolution trend when propagating fibers to replace single-mode preserving equivalent nonlinear effect. In addition, series dispersive waves (also called resonant radiation) can be emitted by perturbated periodic beam oscillation caused spatial self-imaging effect fibers. To more exact,...

We investigate the propagation dynamics of Peregrine soliton, a significant prototype rogue waves, within graded-index multimode fibers, in absence higher-order dispersion. The soliton keeps approximate evolution trend when propagating fibers to replace single-mode preserving equivalent nonlinear effect. In addition, series dispersive waves (also called resonant radiation) can be emitted by perturbated periodic beam oscillation caused spatial self-imaging effect fibers. To more exact,...

We investigate the propagation dynamics of Peregrine soliton, a significant prototype rogue waves, within graded-index multimode fibers, in absence higher-order dispersion. The soliton keeps approximate evolution trend when propagating fibers to replace single-mode preserving equivalent nonlinear effect. In addition, series dispersive waves (also called resonant radiation) can be emitted by perturbated periodic beam oscillation caused spatial self-imaging effect fibers. To more exact,...

We investigate the dynamic of optical rogue waves induced by super-Gaussian (SG) pulses in fiber optic. SG with controlled steep leading and trailing edges can produce high-intensity self-focusing when propagate nonlinear fibers weak dispersion strong nonlinearity. observe emergence various waves, including Peregrine breathers, Akhmediev breathers (AB) 2nd-order AB. By adjusting steepness pulses, generation these be controlled. As pulse increases, we find fundamental-order AB stably coexist....