gaussian beams

说明：  NPR 光纤激光器 Fortran程序(FORTRAN program of NPR fiber laser)

说明：  该程序能够产生涡旋光束，并提取出相位，亲们试试(The program can generate vortex beam, and extract the phase, parents try)

余弦高斯光束图像，可以看到不同传输距离的光强，并且采用分数傅里叶讨论方法！(Cosine Gauss beam image)

说明：  连 续 投 影 算 法(SPA)是 一 种 使 矢 量 空 间 共 线 性最小化的前向变量选择算法， 它的优势在于提取全波段的几个特征波长， 能够消除原始光谱矩阵中冗余的信息，可用于光谱特征波长的筛选。(One of the advantages of spa is that it can be used to eliminate the redundancy of the original spectral features.)

说明：  有效的解包裹程序：傅里叶变换相位解包裹程序(Fourier transform phase unwrapping program)

这五个程序是有关涡旋光的产生和光栅生成的程序。1.是单束涡旋光生成 2.生成叉形光栅。3.生成立体的涡旋光。4.生成不同拓扑荷数涡旋光对应相位图。5.生成正弦周期光栅和螺旋相位片图(These five programs are programs for the generation of vortex beams and the generation of grating. 1. is the generation of single beam of vortex light The 2. generation of fork shaped grating. 3. generation of three-dimensional vortex light. 4. the phase diagram of the different topological charge vortex optical rotation is generated. 5. generation of sinusoidal periodic gratings and spiral phase plate)

利用numpy库实现激光器领域的时域行波模型。该模型输出激光器信号，频谱等。(The time-domain traveling wave model in laser field is realized by using numpy library. The model outputs laser signals, spectrum and so on.)

基于Zernike多项式的波前像差到点扩散函数PSF及MTF的模拟，包含代码及相关文档，特别是PPT，值得好好看。(Based on Zernike polynomial, the simulation from wavefront aberrtation to point spread function PSF and MTF , including code and related documents, especially PPT, worthing high value.)

最小二乘法进行泽尼克多项式拟合将离散数据点拟合成面型。(use the least square method to fit the wavefornt with zernike polynomials.)

说明：  LG光束的光强和相位模拟，包括缔合拉盖尔多项式和相位屏(Intensity and Phase of LG Beams)