Abstract

Previous research on the Gaussian beam was restricted in scope because of the paraxial assumption. Based on a rigorous solution of the Helmholtz equation, the radiation properties of a Gaussian source are reexamined. The results are different from what previous paraxial theory predicted. It is shown that the commonly used concept of the Gaussian beam and the separability of the field distribution along the two transverse axes may be misleading in certain conditions. Furthermore the theoretical upper limit on the beam divergence angle is shown to be 65.5°.

© 1997 Optical Society of America

Far-field distribution of double-heterostructure diode laser beams

Xiaodong Zeng and Amir Naqwi
Appl. Opt. 32(24) 4491-4494 (1993)

Maximum far-field divergence angle of a plane source

Xiaodong Zeng and Changhong Liang
Appl. Opt. 35(16) 3068-3071 (1996)

Far-field propagation of an off-axis Gaussian wave

Xiaodong Zeng, Changhong Liang, and Yuying An
Appl. Opt. 38(30) 6253-6256 (1999)

Analytical far-field divergence angle of a truncated Gaussian beam

Emmanuel M. Drège, Neal G. Skinner, and Dale M. Byrne
Appl. Opt. 39(27) 4918-4925 (2000)

Decentered Gaussian beams, ray bundles, and Bessel–Gauss beams

Claudio Palma
Appl. Opt. 36(6) 1116-1120 (1997)