A new kind of laser beam, called a decentered elliptical Gaussian beam (DEGB), is defined by a tensor method. The propagation formula for a DEGB passing through an axially nonsymmetrical paraxial optical system is derived through vector integration. The derived formula can be reduced to the formula for a fundamental elliptical Gaussian beam and a decentered Gaussian beam under certain conditions. As an example application of the derived formula, the propagation characteristics of a DEGB in free space are calculated and discussed. As another example we study the properties of a generalized laser beam array constructed by use of a DEGB as the fundamental mode.
© 2002 Optical Society of America
Original Manuscript: September 4, 2001
Revised Manuscript: April 22, 2002
Published: July 20, 2002
Yangjian Cai and Qiang Lin, "Decentered elliptical Gaussian beam," Appl. Opt. 41, 4336-4340 (2002)