Controllable Dispersive Wave Radiation from Pearcey Gaussian Pulses

Abstract

The process of dispersive waves (DWs) emitted from unique Pearcey Gaussian (PG) pulses with both temporal and spectral asymmetric shapes in the anomalous dispersion region of optical fiber is investigated. In contrast to symmetric pulses such as fundamental soliton (Sech) or Gaussian, the radiation amplitude and energy conversion efficiency of DWs are significantly improved by adjusting the asymmetry of the spectral distribution and the temporal oscillation structure of PG pulses. It is shown that, for the case of PG pulses, the minimum value of third-order dispersion parameter required for the emergence of DWs emission is nearly reduced 50% compared with the case of symmetric pulses. It is also shown that the radiation frequency of DWs emitted from PG pulses can be predicted by a modified phase matching condition. The theoretical predictions are in good agreement with the numerical simulations. The impact of Raman scattering effects on the DWs emission is also disclosed. The results of this study clearly reveal the impact of the inherent behaviors of PG pulses on the DWs emission, which should be relevant for applications requiring broadband light sources based on the mechanism of DWs emission.

Controlling the Trajectory of Swallowtail Gaussian Beams in Dynamic Parabolic Potentials

“…[7] Due to their unique optical properties, Airy and Pearcey beams have great application DOI: 10.1002/andp.202300211 prospect in optical microparticles manipulation, optical imaging, and optical trapping. [8][9][10][11][12][13][14] However, research has been mainly limited to the lower-order Airy and Pearcey beams, with relatively little investigation and manipulation of the higher-order Swallowtail beams. [15] The photonic potential refers to an external potential that can effectively modify the dynamic behavior of the beam, which is based on the refractive index distribution of the medium.…”