S. Amarande et al., Propagation analysis of self-convergent beam width and characterization ofhard-edge diffracted beams, APPL OPTICS, 39(22), 2000, pp. 3914-3924
For a laser beam diffracted by a hard-edge aperture, propagation of the bea
m width, defined by the second-order moment of its irradiance distribution
truncated according to the self-convergent-width criterion, obeys the famil
iar hyperbolic law. It is demonstrated numerically that, with the self-conv
ergent-width approach, the beam-propagation parameters for three beam types
(Gaussian, Hermite Gaussian, and flattened Gaussian) diffracted by hard-ed
ge apertures can be determined with the second-moment-based procedure that
is recommended by the present draft standard only for unapertured laser bea
ms. (C) 2000 Optical Society of America. OCIS codes: 120.4800, 140.3430, 35
0.5500.