Waveguides induced by grey screening solitons |
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| Authors: | Lu Ke-Qing Zhao Wei Yang Yan-Long Zhang Mei-Zhi Li Jin-Ping Liu Hong-Jun and Zhang Yan-Peng |
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| Affiliation: | State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academic of Sciences, Xi'an 710068, China; Department of Electronic Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China |
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| Abstract: | We investigate the properties of waveguides induced by one-dimensional grey
screening solitons in biased photorefractive crystals. The results show that
waveguides induced by grey screening solitons are always of single mode for all
intensity ratios, i.e. the ratios between the peak intensity of the
soliton and the dark irradiance. Our analysis indicates that the
energy confined near the centre of the grey soliton and the propagation constant of
the guided mode of the waveguide induced by the grey screening soliton
increase monotonically with intensity ratio increasing. On the other hand,
when the soliton greyness increases, the energy confined near the centre
of the grey soliton and the propagation constant of the guided mode of the
waveguide induced by the grey screening soliton decrease monotonically.
Relevant examples are provided where photorefractive crystal is of the
strontium barium niobate type. |
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| Keywords: | soliton waveguide photorefractive effect nonlinear optics |
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