A comparison of beam divergence and power-transport efficiency is made between Gaussian and Bessel beams when both beams have the same initial total power and the same initial full width at half-maximum.
© 1988 Optical Society of America
J. Durnin, J. J. Miceli Jr., and J. H. Eberly, "Comparison of Bessel and Gaussian beams," Opt. Lett. 13, 79-80 (1988)