Velocities of Gaussian beam propagation in vacuum

Details Velocities of Gaussian beam propagation in vacuum Velocities of Gaussian beam propagation in vacuum

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4926....1w&link_type=abstract

Proc. SPIE Vol. 4926, p. 1-6, Adaptive Optics and Applications II, Wenhan Jiang; Robert K. Tyson; Eds.

Physics

Optics

Scientific paper

The variations of group velocities for Gaussian beams under different hypotheses were studied, and the rationality of the results were discussed and analysed. Then we show that the beam waist radius should be proportional to the square root of wavelength. Under this condition, the group velocities are all equal to c on the beam axis and smaller than c off the axis.

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