Applied Physics B

, 86:319

Fields of a Gaussian beam beyond the paraxial approximation

Article

DOI: 10.1007/s00340-006-2442-4

Cite this article as:
Salamin, Y. Appl. Phys. B (2007) 86: 319. doi:10.1007/s00340-006-2442-4

Abstract

Analytic expressions for the fields of a tightly focused Gaussian laser beam are derived, accurate to ε11, where ε is the diffraction angle. It is found that, for example, using the derived fields, the calculated power can be about 25% more accurate than when calculated using the paraxial approximation for a beam focused down to a waist radius w0∼0.4λ, where λ is the wavelength.

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.Physics DepartmentAmerican University of SharjahSharjahUnited Arab Emirates