Abstract

The properties of TEM₀₁* doughnut modes have been examined by frequency analysis and by two-beam interference. Interpretation in terms of an evolving helix, made up to two orthogonal TEM₀₁ modes of different frequency, is supported by computer simulation of fringe patterns. These patterns are shown to correspond closely with photographic recordings; the implications of the phenomena for the crossed-beam technique in laser velocimetry are outlined. Finally, the possibility of developing a beam of pure helical cophasal surface is discussed and its interference patterns analyzed.

© 1983 Optical Society of America

Asymmetric focusing of a laser beam in TEM₀₁ doughnut mode in a nonlinear dielectric*

M. S. Sodha, V. P. Nayyar, and V. K. Tripathi
J. Opt. Soc. Am. 64(7) 941-943 (1974)

Effect of spatial incoherence of the laser in photon-correlation spectroscopy

P. N. Pusey, J. M. Vaughan, and D. V. Willetts
J. Opt. Soc. Am. 73(8) 1012-1017 (1983)

Thermal self-focusing of TEM₀₁ laser beams and ring-shape self-focusing of two specific mixtures of modes*

M. S. Sodha and V. P. Nayyar
J. Opt. Soc. Am. 65(9) 1027-1030 (1975)

Reflective terahertz imaging with the TEM₀₁ mode laser beam

Irmantas Kašalynas, Rimvydas Venckevičius, Laurynas Tumonis, Bogdan Voisiat, Dalius Seliuta, Gintaras Valušis, and Gediminas Račiukaitis
Appl. Opt. 52(23) 5640-5644 (2013)

Radiation force and torque exerted on a stratified sphere in the circularly polarized TEM₀₁*-mode laser beam

Soo Chang and Sang Soo Lee
J. Opt. Soc. Am. B 5(1) 61-66 (1988)