Collection Of theses on high power laser and plasma physics, 2009, 7 (1): 12753, Published Online: Jun. 2, 2017
Propagation of flat-topped multi-Gaussian beams through a double-lens system with apertures
Abstract
A general model for different apertures and flat-topped laser beams based on the multi-Gaussian function is developed. The general analytical expression for the propagation of a flat-topped beam through a general double-lens system with apertures is derived using the above model. Then, the propagation characteristics of the flat-topped beam through a spatial filter are investigated by using a simplified analytical expression. Based on the Fluence beam contrast and the Fill factor, the influences of a pinhole size on the propagation of the flat-topped multi-Gaussian beam (FMGB) through the spatial filter are illustrated. An analytical expression for the propagation of the FMGB through the spatial filter with a misaligned pinhole is presented, and the influences of the pinhole offset are evaluated.
Yanqi Gao, Baoqiang Zhu, Daizhong Liu, Zunqi Lin. Propagation of flat-topped multi-Gaussian beams through a double-lens system with apertures[J]. Collection Of theses on high power laser and plasma physics, 2009, 7(1): 12753.