A peculiarity of diffraction measurements using a Gaussian laser beam

✍ Scribed by N.M. Gagina; D.B. Hann; B.S. Rinkevichius

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 302 KB
• Volume: 29
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/s0030-3992(97)00061-3

✦ Synopsis

Numerical modelling of the Gaussian beam diffraction by a wire near the Fraunhofer limit is presented. Two cases are considered: the case of the wire being on the axis of the beam and the case of the wire being off-axis. For the case where the wire is on the axis, the displacements of the diffracted minima are calculated. For the off-axis case, the changes in the positions of the maxima and minima and the power density are calculated. The conditions are determined at which the measurements made using a Gaussian beam can be calculated using the formula for plane waves. This work arises in connection with research being performed into the Doppler spectrum of big particles.