Observation of new modal patterns in experiments with Hermite Gaussian and Laguerre-Gaussian laser modes

K. Contreras, G. Baldwin, F. De Zela, E. J. Gálvez

Producción científica: Contribución a una revistaArtículo de la conferenciarevisión exhaustiva


We present several experiments that allow us to show the intensity and phase structure of transverse modal patterns, Hermite-Gaussian and Laguerre-Gaussian laser modes and dynamical transverse patterns. These new spatial configurations of the light depend on the dynamics of laser resonator, and on the boundary conditions. The Laguerre-Gaussian modes are obtained either by the direct conversion of Hermite-Gaussian modes using a modal converter or with a computer-generated hologram. The modal converter is based on a cavity of cylindrical lenses. We analyse the phase structure and optical phase singularities of laser modes with a Mach-Zehnder interferometer. The resulting interference patterns clearly illustrate the azimuthal phase dependence of the Laguerre-Gaussian modes, which is the origin of the orbital angular momentum associated with each one of them. Moreover, we try to give an explanation of the new modal patterns observed.

Idioma originalInglés
Número de artículo63
Páginas (desde-hasta)336-341
Número de páginas6
PublicaciónProceedings of SPIE - The International Society for Optical Engineering
EstadoPublicada - 2004
EventoRIAO/OPTILAS 2004: 5th Iberoamerican Meeting on Optics, and 8th Latin American Meeting on Optics, Lasers, and their Applications; ICO Regional Meeting - Porlamar, República Bolivariana de Venezuela
Duración: 3 oct. 20048 oct. 2004


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