Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Optica Applicata

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: photorefractive medium

Sortuj według:

Ogranicz wyniki do:

Controllable propagation of Pearcey–Gaussian beams in photorefractive media with fractional Schrödinger equation

Guo Teng, Gao Ru, Ren Shumin, Wang Pengxiang, Xiao Yan

Optica Applicata

2022

Vol. 52, nr 4

627--638

Taking the fractional Schrödinger equation as the theoretical model, the evolution behavior of the Pearcey–Gaussian beam in the photorefractive medium is studied. The results show that breathing solitons are generated when the nonlinear effect and the diffraction effect are balanced with each other. Nonlinear coefficients, Lévy index and beams amplitude affect breathing period of the soliton and maximum peak intensity. Within a certain range, the breathing period of the soliton decreases with the increase of the nonlinear coefficient and the Lévy index. However when the beams amplitude increases, the breathing period and the maximum peak intensity of the soliton increase. Under the photorefractive effect, due to the bidirectional self-acceleration property of the Pearcey beam, the solitons formed will propagate vertically. These properties can be used to manipulate the beam and have potential applications in optical switching, plasma channeling, particle manipulation, etc.

One approximation to multiple beam amplification in negative Kerr-type media

Marroquin F., Apolinar-Iribe A.

Optica Applicata

2012

Vol. 42, nr 3

455-465

It is shown that the interaction of two strong pumps with four weak signal beams, not coplanar with the pump beam, gives rise to the exponential amplification of the weak beams in a Kerr-type negative medium. The theory developed is applied to the case of noise formation in iron-doped lithium niobate.