Fields of a linearly polarized fundamental Gaussian beam are derived exactly using the propagation characteristics of a complex-source-point spherical wave diverging from the origin. Intensity distributions are calculated and compared with their counterparts in a truncated series. It is found that utility of the exact fields is limited by a discontinuity inherent in the vector potential from which they have been obtained.
© 2009 Optical Society of America
Original Manuscript: November 6, 2008
Revised Manuscript: December 18, 2008
Manuscript Accepted: January 11, 2009
Published: February 27, 2009
Yousef I. Salamin, "Fields of a focused linearly polarized Gaussian beam: truncated series versus the complex-source-point spherical-wave representation," Opt. Lett. 34, 683-685 (2009)