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本文用一种简单的镜前分光系统记录了一立体图像,是研究准相位共扼镜对其实现三维图像再现的一种新颖方法. 相似文献
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基于模式耦合理论,研究了呈一字型排列的多根平行单模光纤间的功率转移,分析了光纤间距对耦合系数和功率转移的影响,给出了三根平行单模光纤耦合方程的解,针对不同的初始条件进行了比较分析.数值计算表明,呈一字型排列的多根平行单模光纤间的功率成一定周期转移. 相似文献
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A generalized formula of hollow Gaussian beams through the first-order misaligned ABCD systems is derived by using the generalized diffraction integral formula. It is shown that the hollow Gaussian beam passing through the misaligned system becomes a decentred hollow Gaussian beam. The propagation properties of the output beam are investigated when it propagates through a simple misaligned lens system. These results provide a powerful theoretical tool for applications of optical traps. 相似文献
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A hlgh-order Bessel-Gaussian mode is introduced to describe hollow beams. The results for high-order Bessel-Gaussian beams propagating through lens focusing system and free space are derived in terms of Collins integral formula. The diffraction patterns and profile for high-order Bessel-Gaussian beams propagating through the above-mentioned optical systems are illustrated. 相似文献
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The material dispersion of a tapered fiber is described by Sellmeier's equation. The dependence of refractive index on wavelength and doping concentration is discussed. A He-Ne laser with the output wavelength of 632.8 nm is used in the experiment. When the cutoff frequency of the fiber is less than the laser frequency, the guiding modes of a singl~-mode fiber (at 1550 am) are investigated. The results show that the original single-mode fiber becomes a multi-mode waveguide. The propagation and mode coupling of the light in the taper region are analyzed. By controlling the taper end size of the fiber, the unique tapered fiber can convert a multi-mode beam into a single-mode one. 相似文献
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提出了一种用来描述空心光束的新理论模型——空心高斯光束模型,通过控制光束参数可以方便地调制空心光束黑斑的大小.导出了空心高斯光束经傍轴光学系统的解析传输变换公式.利用导出的公式计算分析了空心高斯光束在自由空间的传输特性.在实验上利用矩阵本征值方法设计了能输出空心高斯光束的光学谐振腔,对实验上得到的空心高斯光束进行了传输特性的研究.结果表明,理论和实验相吻合.该空心高斯光束产生的光势阱为控制冷原子提供了一条新途径.
关键词:
空心高斯光束
光学谐振腔
传输特性 相似文献