Irradiance-moments characterization of off-axis Gaussian beam combinations by means of the Wigner distribution function
Authors: Li, B.; Lü, B.
Source: Optik International Journal for Light and Electron Optics, Volume 113, Number 11, January 2003 , pp. 469-475(7)
Publisher: Urban & Fischer
The irradiance-moments characterization of off-axis Gaussian beam combinations is presented in use of the Wigner distribution function (WDF). Analytical expressions for the propagation through an optical paraxial ABCD system, beam propagation factor (M 2 factor), beam width, far field divergence angle and kurtosis parameter of the resultant beam are derived and illustrated with specific numerical examples. It is reexamined that a flat-topped irradiance profile of the resultant beam can be achieved at a certain plane by appropriately choosing beamlet parameters. As compared with previous work, our results show the advantage of using the WDF and irradiance-moments methods.
Document Type: Original Article
Affiliations: Institute of Laser Physics and Chemistry, Sichuan University, Chengdu, 610064, China
Publication date: January 1, 2003