高斯光束通过含失调窄缝光阑的失调光学系统的传输特性
Propagation properties of Gaussian beam passing through a misaligned optical system with misaligned narrow slot aperture
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摘要: 利用硬边窄缝光阑的近似展开式和适用于失调光学系统的广义衍射公式，得出了高斯光束经含失调窄缝光阑的失调光学系统传输的近似解析式。模拟结果表明输出光束场分布与光束参量、光阑尺寸、ABCD矩阵元、光阑失调量和光学系统失调量有关。针对给定的光学系统和高斯光束定量分析了各失调量对输出光束场分布的影响，结果表明:光阑横向位移、光学系统横向位移和角位移均引起垂直于z轴截面内明显的光强非轴对称分布。当光阑半宽度为1 mm时,光阑的衍射作用使腰斑半径为0.5 mm的高斯光束产生-1.586π～1.465π范围的相对相移，且光阑横向位移、光学系统横向位移和角位移均引起焦平面前后相对相移的迅速变化。随光阑宽度变小，各失调量对输出光束特性的影响越明显。
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关键词:
- 失调光学系统 /
- 高斯光束 /
- 硬边窄缝光阑孔径函数 /
- 强度分布 /
- 相对相移
Abstract: By using approximate expression of the hard-edge narrow slot aperture function and generalized diffraction formula, an approximate analytical expression of the output field distribution for a Gaussian beam passing through an optical system with a misaligned narrow slot aperture has been derived. Smulation results show that the output field distribution is related with Gaussian beam parameters, aperture size, ABCD matrix elements and misaligned parameters. The effect of misaligned parameters on output field distribution are also illustrated quantitatively for given optical system and Gaussian beam, and results show that the transverse displacements of the aperture and the transverse displcement and the angle displacement of the optical system bring forth non-axisymmetric distribution of int -
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