Studies on the diffraction image of a thermal lens.
Studies on the diffraction image of a thermal lens.
复制标题
热透镜衍射图像的研究。
DOI：
10.1364/ao.34.000041
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发表时间：
1995
期刊：
影响因子：
1.9
通讯作者：
W. Schröer
中科院分区：
文献类型：
--
作者：
Frank Jürgensen;W. Schröer
利用菲涅耳衍射积分的数值积分法计算了热透镜后的光强分布，并与几种给出的热透镜后中心激光探测的近似模型进行了比较，其中包括一种新的适用于强热透镜的衍射积分近似解。即使热透镜很弱，考虑热透镜的异常性质也是至关重要的。给出了最强干涉环位置与热透镜强度呈线性关系的简单近似公式。讨论了弱热透镜的横向轮廓。结果表明，即使观察到高斯分布，球差也会改变中心强度。
We calculated the intensity distribution behind a thermal lens by using a numerical quadrature of the Fresnel diffraction integral and compared it to several given approximate models for laser light detection in the center behind a thermal lens, which includes a new approximate solution of the diffraction integral with applicability to strong thermal lenses. Consideration of the aberrant nature of the thermal lens is crucial even if the thermal lens is weak. A simple approximate formula for the position of the most intense interference ring stating a linear dependence of the thermal lens strength is given. The transverse profile of a weak thermal lens is discussed. It is shown that spherical aberration modifies the central intensity even if a Gaussian profile is observed.