| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Formation of Hot Images in Laser Beams through a Self-defocusing Kerr Medium Slab |
| WANG You-Wen1,2, DENG Jian-Qin1, CHEN Lie-Zun1,2, WEN Shuang-Chun1, YOU Kai-Ming 1,2 |
| 1Key Laboratory for Micro/Nano Optoelectronic Devices (Ministry of Education), School of Computer and Communication, Hunan University, Changsha 4100822Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008 |
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| Cite this article: |
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WANG You-Wen, DENG Jian-Qin, CHEN Lie-Zun et al 2009 Chin. Phys. Lett. 26 024205 |
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Abstract A nonlinear hot image is usually thought as of a special case of self-focusing, and thus occurs when a laser beam propagates through a slab of self-focusing medium. Here we show theoretically that a hot image may also be formed by a thin slab of self-defocusing medium. The physical origin for this hot image formation is akin to the in-line volume--phase holographic imaging due to the intensity-dependent refractive-index modulation of the self-defocusing medium. Numerical simulations confirm the theoretical prediction and further identify the dependence of the hot image on the beam power, the modulation depth of obscuration and the thickness of self-defocusing medium. The analysis presented here brings new insight into the physics of hot image formation in the high power laser system
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| Keywords:
42.65.Jx
42.40.Pa
42.25.Fx
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Received: 16 June 2008
Published: 20 January 2009
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| PACS: |
42.65.Jx
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(Beam trapping, self-focusing and defocusing; self-phase modulation)
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42.40.Pa
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(Volume holograms)
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42.25.Fx
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(Diffraction and scattering)
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