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Nonlocal spatial loss optical solitons and their interactions

Author: LiChangHua
Tutor: WangXingHua
School: Gannan Teachers' College
Course: Optics
Keywords: Nonlinear optics Nonlocal Media Small loss Lossy spatial solitons Soliton interaction
CLC: O437
Type: Master's thesis
Year: 2011
Downloads: 25
Quote: 0
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Abstract


Today, research on optical solitons in nonlocal media has caused great interest of the people at the Institute of theoretical and experimental results show that: the nonlocal spatial soliton than local area soliton has richer research content and a wide range of potential applications. First study containing a small loss and weakly nonlocal nonlinear media e exponential response in 12-dimensional sech beam propagation, the evolution equation of the beam parameters and the evolution of a critical power; dielectric loss and small enough premise, a sech type loss of the 12-dimensional space beam leniency small can remain approximately unchanged, apart from a phase shift solitons. Second made a detailed analysis of the 11 dimensional Gaussian beam loss space optical soliton the parameters evolution equations and beam width of evolution, when the beam waist from the light at the incident, and the initial power is equal to the critical power, and the loss enough hours, 11-dimensional Gaussian-type single-beam beam width will be rendered very slow broadening, when the 11-dimensional Gaussian-type single-beam transmission distance far, can approximate to get its beam width slowly broadening of the quasi-space optical soliton - loss solitons; periodic changes in broadening when the initial beam power is less than the critical power beam width will be quasi-cosine function; - when the beam initial input power is greater than the critical power, beam width will be quasi-cosine function for cycle compression change over to the change periodically broadening. And then followed with a small loss elliptical symmetry strong nonlocal media paraxial elliptical Gaussian beam propagation, the evolution equation of the beam parameters and beam width evolution, when the initial power is equal to the critical power, and the media The loss is sufficiently small, paraxial elliptical Gaussian beam transmission, beam width continued to slowly show wide elliptical Gaussian lossy spatial soliton. Finally, the strong nonlocal media in 11-dimensional Gaussian beam interaction with small loss, with a small loss in the strong nonlocal media 11 dimensional Gaussian beam propagation the model, based on the use of analytic methods to study the evolution of the dual-beam transmission, the quasi-soliton solutions; Loss After further analysis was Airy function attracted to each other in the form of two-beam center trajectory during transmission; gradually increases, the transmission distance is gradually lengthened, the two beams of light forcing gradually weakened, and the ability to attract each other becomes small, the locus of the center of the two beams is increasingly away from the transmission axis, the distance between the centers of the two light beams increasingly large.

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CLC: > Mathematical sciences and chemical > Physics > Optics > Nonlinear optical ( light and matter)
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