双光子中心对称光折变宽光束调制不稳定性

吉选芒; 姜其畅; 刘劲松

doi:10.3969/j.issn.1001-3806.2011.06.024

双光子中心对称光折变宽光束调制不稳定性

1.
运城学院物理与电子工程系, 运城 044000;
2.
华中科技大学光电子科学与工程学院, 武汉 430074

作者简介: 吉选芒(1965-)，男，硕士，教授，从事物理教与光折变非线性光学方面的研究工作。Email:jixuanmang@126.com.

基金项目:
山西省高等学校科技开发基金资助项目(200611042)
中图分类号: O437

Modulation instability of broad optical beams in biased two-photon centrosymmetric photorefractive crystals

1.
Department of Physics and Electronic Engineering, Yuncheng University, Yuncheng 044000, China;
2.
College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
CLC number: O437

摘要: 为了得到稳态条件下1维宽光束在有偏压双光子中心对称光折变晶体中的调制不稳定性的结果,通过空间电荷场的局域性处理和数值模拟的方法,获得了1维调制不稳定性的增长率。结果表明,在入射光束强度一定的情况下,调制不稳定性增长率最大值随外加电场以及空间频率域的增加而增大;在外加电场给定时,调制不稳定性增长率的最大值随入射光强的增大先达到一峰值后又减小。宽光束的调制不稳定性取决于外加电场及入射光束强度与暗辐射的比值。
- 非线性光学 /
- 中心对称光折变晶体 /
- 双光子光折变效应 /
- 调制不稳定性
Abstract: In order to obtain the modulation instability of 1-D broad optical beams in biased two-photon centrosymmetric photorefractive crystals under steady-state conditions, the growth rate of 1-D modulation instability was obtained by means of numerical simulation method after treating the space-charge field locally. The numerical results show that the maximum modulation instability growth rates increases linearly with the external electric field and spatial-frequency when the incident optical intensity is constant. When the external electric field is fixed, the maximum modulation instability growth rates increases to a maximum then decreases as the incident optical intensity increases. The modulation instability of 1-D broad optical beams depends on the external bias field and the ratio of optical beam's intensity to that of the dark irradiance.
- nonlinear optics /
- centrosymmetric photorefractive crystals /
- two-photon photorefractive effect /
- modulation instability

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双光子中心对称光折变宽光束调制不稳定性

作者简介: 吉选芒(1965-)，男，硕士，教授，从事物理教与光折变非线性光学方面的研究工作。Email:jixuanmang@126.com.

Modulation instability of broad optical beams in biased two-photon centrosymmetric photorefractive crystals

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双光子中心对称光折变宽光束调制不稳定性

作者简介: 吉选芒(1965-)，男，硕士，教授，从事物理教与光折变非线性光学方面的研究工作。Email:jixuanmang@126.com

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Modulation instability of broad optical beams in biased two-photon centrosymmetric photorefractive crystals

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双光子中心对称光折变宽光束调制不稳定性

作者简介: 吉选芒(1965-)，男，硕士，教授，从事物理教与光折变非线性光学方面的研究工作。Email:jixuanmang@126.com.

Modulation instability of broad optical beams in biased two-photon centrosymmetric photorefractive crystals

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双光子中心对称光折变宽光束调制不稳定性

作者简介: 吉选芒(1965-)，男，硕士，教授，从事物理教与光折变非线性光学方面的研究工作。Email:jixuanmang@126.com

English Abstract

Modulation instability of broad optical beams in biased two-photon centrosymmetric photorefractive crystals

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