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The Temperature Dependence of Separate Spatial Soliton Pairs in an Series Two-Photon Photorefractive Crystal Circuit

Author: LiBaoYu
Tutor: HouChunFeng
School: Harbin Institute of Technology
Course: Optics
Keywords: Nonlinear Optical Two-photon photorefractive effect Spatial soliton pairs Temperature Characteristics
CLC: O437
Type: Master's thesis
Year: 2010
Downloads: 18
Quote: 0
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Abstract


When photorefractive materials beam self-focusing effect and the role of the diffraction divergence of equilibrium , the beam can keep the same shape in the medium , the formation of photorefractive solitons . Photorefractive spatial soliton propagation characteristics make the optical information processing, optical switches , integrated optics , optical interconnect and optical computing , and many other aspects of broad application prospects in recent years , causing widespread concern . This article describes the derivation of the model based on Castro-Camus tandem two-photon photorefractive crystal circuit separate spatial soliton pairs of coupling theory , and deduced shielded two-photon photorefractive crystal circuit separate spatial soliton pairs coupling coefficient expression , while discussing temperature on the coupling properties. Through numerical simulation , shielded pair of series circuit coupling characteristics of spatial soliton pairs analyzed theoretically predicted in the series photorefractive crystal circuit capable of forming a photorefractive spatial soliton pairs , there were bright - bright , light and dark , and dark - dark separate spatial soliton pairs three types. This soliton pair interactions can occur between two solitons . When the incident beam spatial broadening size is much smaller than the crystal size, dark soliton soliton pair can affect another soliton , bright soliton can also affect the other soliton . Conclusion : In considering temperature case, through a series circuit coupled dark solitons can affect bright and dark solitons ; bright soliton can also affect both bright and dark solitons . This is the case without considering temperature , bright soliton can not affect the bright and dark soliton behavior is different . The reason is because it is dark radiation temperature of the crystal a great influence on photorefractive spatial solitons from medium photorefractive effect , medium dark radiation in photorefractive process plays a role , so the media dark radiation photorefractive solitons influence the formation , the temperature photorefractive solitons also has a certain impact. Therefore, in considering the temperature , I get different results. Series circuit is also discussed separately in two-photon photorefractive screening-photovoltaic soliton pairs evolution and simulated series circuit two-photon photorefractive crystals soliton pairs coupling process . To light - dark Separate spatial soliton pairs , for example, on the soliton phenomena that occur when the coupling is analyzed.

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