Mr. Y. H. Zhang Profile

Y. H. Zhang

at Xi'an Institute of Optics and Precision Mechanics

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Proceedings Article | 5 November 2010 Paper

Incoherent dark solitons splitting in LiNbO3:Fe crystal

Yuhong Zhang, Keqing Lu, Xuewen Long, Kehao Li, Jianbang Guo

Proceedings Volume 7846, 78460U (2010) https://doi.org/10.1117/12.868757

KEYWORDS: Solitons, Crystals, Laser crystals, Photovoltaics, Nonlinear crystals, Iron, Diffraction, Visibility, Diffusers, Beam splitters

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We observed experimentally one-dimensional even-number sequence of dark photovoltaic solitons in LiNbO₃:Fe crystal without additional background illumination with spatially incoherent beam that contains a dark stripe generated from an amplitude jump in the center of the incoherent beam. In experiment, we found that the initial stripe width at the entrance face of the crystal is a key parameter for generating an even-number sequence of dark incoherent photovoltaic solitons. If the initial width of the dark stripe was small, only a Y-junction soliton pair was generated. As the initial width of the dark stripe was creased to 20.1μm, the stripe can split into an even-number sequence of soliton structure. The soliton pairs far away from the center had smaller width and less visibility. In addition, the separations between adjacent dark stripes became slightly smaller than that of the Y-junction dark solitons. In particular, when the input width in the entrance face of the crystal was 30.8μm, the diffractive beam in the output face of the crystal was no longer expanding its outer boundary, but shrank its width.

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