Geometry of the fringe field formed in the intersection of two Gaussian beams.
Geometry of the fringe field formed in the intersection of two Gaussian beams.
复制标题
两个高斯光束相交时形成的边缘场的几何形状。
作者：
P. Miles
获得了精确计算任意束腰位置和尺寸的两个近轴高斯光束相交体积中的边缘场的通用表达式。然后简化该表达式，以允许轻松进行边缘场计算，同时保持良好的精度。通过将简化表达式与双光束激光多普勒测速仪相关的系统参数联系起来，得到简单的设计方程。这些方程允许快速评估沿相交体积的长轴和短轴的边缘场变化，并清楚地识别控制这种变化的系统参数。
A general expression is obtained for the exact computation of the fringe field in the intersection volume of two paraxial Gaussian beams for arbitrary beam waist positions and sizes. The expression is then simplified to allow easy fringe field computation while retaining good accuracy. By relating the simplified expression to the system parameters relevant to dual-beam laser Doppler velocimeters, simple design equations are obtained. These equations permit rapid evaluation of the fringe field variation along the major and minor axes of the intersection volume and clearly identify the system parameters controlling this variation.