Open AccessStudy of propagation characteristics and control of one-dimensional optical lattice soliton
Author(s) -
Jieying Wu,
Fu Xi-Quan,
Shuangchun Wen
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.1840
Subject(s) - physics , soliton , chirp , diffraction , refractive index , optics , lattice (music) , beam propagation method , beam (structure) , self phase modulation , modulation (music) , nonlinear system , offset (computer science) , nonlinear optics , quantum mechanics , laser , computer science , acoustics , programming language
Propagation of optical lattice soliton in nonlinear Kerr medium with harmonic modulation of refractive index is investigated analytically and numerically. The equations governing evolution of the soliton parameters and the conditions for soliton formation and stable propagation are obtained. It is shown that the beam is finally trapped in a guide-like channel and propagates stably when the launching angle is smaller than a critical value. The critical angle increases as the depth and period of modulation of refractive index increase, and increases as the beam width decreases. Furthermore, linear spatial chirp upsets the balance between diffraction and nonlinearity, thus affects the formation and stable propagation of the soliton, although it doesn't affect the central position of the beam. In order to maintain the soliton propagation one can offset the effect of the chirp by using proper beam power.