Noach S, Lewis A, Arieli Y, Eisenberg N
Appl Opt. 1996 Jul 1;35(19):3635-9. doi: 10.1364/AO.35.003635.
Diffractive elements can be designed for spectrum shaping in the Fourier or Fresnel plane by iterative methods. It is necessary to use a Fourier lens and the wavelength for which the diffractive elements were designed to get the required spectrum shaping at the Fourier plane. Using a different wavelength will cause chromatic aberration. We deal with the combination of refractive and diffractive elements and two or more different diffractive elements on the same element to get appropriate beam shaping of light sources with a multiple spectral output. Simulations are preformed that transform the profile of a He-Ne laser with a Nd:YAG laser source, and shape the trapezoidal beam profile of an excimer laser into a Gaussian beam is also considered.
衍射元件可以通过迭代方法设计用于在傅里叶或菲涅耳平面中进行光谱整形。有必要使用傅里叶透镜以及设计衍射元件时所采用的波长，以便在傅里叶平面获得所需的光谱整形。使用不同的波长会导致色差。我们研究了折射元件和衍射元件的组合，以及在同一元件上使用两个或更多不同的衍射元件，以对具有多光谱输出的光源进行适当的光束整形。还进行了模拟，将Nd:YAG激光源的He-Ne激光轮廓进行变换，并将准分子激光的梯形光束轮廓整形为高斯光束也在考虑范围内。
