| 余弦高斯光束在梯度折射率介质中的传输特性 |
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| 引用本文： | 宋宏远, 张廷蓉, 陈森会, 等. 余弦高斯光束在梯度折射率介质中的传输特性[J]. 强激光与粒子束, 2011, 23(04). |
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| 作者姓名： | 宋宏远 张廷蓉 陈森会 黄永超 李艳桃 张伟林 |
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| 作者单位： | 1.四川师范大学 物理与电子工程学院, 成都 61 0066 |
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| 摘 要： | 为了研究光束在梯度折射率介质中的传输规律，利用广义惠更斯-菲涅耳衍射积分法，推导出余弦高斯光束在梯度折射率介质中传输的解析表达式，对余弦高斯光束在梯度折射率介质中的传输特性进行了分析，并进一步讨论了介质梯度折射率系数和调制参数对传输特性的影响。结果表明，余弦高斯光束在梯度折射率介质中传输时,轴上光强分布呈现周期性变化,横向光强分布受梯度折射率系数和调制参数影响较大。余弦高斯光束传输时具有不稳定性，通过适当调节参数,可在空间某位置实现余弦高斯光束的整形。
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| 关 键 词： | 余弦高斯光束 广义衍射积分法 梯度折射率介质 传输特性 近轴光学系统 |
Propagation properties of cosine-Gaussian beams in gradient-index medium |
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| song hongyuan, zhang tingrong, chen senhui, et al. Propagation properties of cosine-Gaussian beams in gradient-index medium[J]. High Power Laser and Particle Beams, 2011, 23. |
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| Authors: | song hongyuan zhang tingrong chen senhui huang yongchao li yantao zhang weilin |
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| Affiliation: | 1. Institute of Physics and Electronic Engineering,Sichuan Normal University,Chengdu 610066,China |
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| Abstract: | Using the method of generalized Huygens-Fresnel diffraction integral, this paper deduces the analytical expression of cosine-Gaussian beams propagating in a gradient-index medium, and analyzes the corresponding propagation properties of cosine-Gaussian beams. The influence of the medium’s gradient-index parameter and the modulation parameter on the propagation properties is also discussed. The results show that the intensity of cosine-Gaussian beams propagating in a gradient-index medium varies periodically on axis. The transverse intensity distribution is largely influenced by the modulation parameter. The transmission of cosine-Gaussian beams is unstable, but the cosine-Gaussian beams can be reshaped through appropriately adjusting the modulation parameter at some spatial position. |
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| Keywords: | cosine-gaussian beams generalized diffraction integral gradient-index medium propagation properties paraxial optical system |
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