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A complete spatial characterization (in second-order moments) of a doughnut-type beam from a pulsed transversely excited atmospheric CO_2 laser is described. It includes the measurement of the orbital angular momentum carried by the beam. The ke[...]texto impreso
We show how to decouple a coherent Gaussian beam having general astigmatism (to transform it into a beam having only simple astigmatism, or orthogonal symmetry) by using a single rotated thin cylindrical lens. The resulting coherent orthogonal G[...]texto impreso
Serna Galán, Julio ; Nemes, George ; Eppich, Bernd ; Gao, Chuanhou ; Weber, Hans | SPIE--The International Society for Optical Engineering | 1999We define the pseudo-symmetrical (PS), or the non-rotating general astigmatic beams (NRGA), and investigate them theoretically and experimentally. We show that to any type of symmetrical (S) beam, such as stigmatic (ST), aligned simple astigmati[...]texto impreso
The phase space analyzer is an optical device that uses slits, lenses and an irradiance-calibrated image detector in order to characterize optical beams. With such a device it is possible to obtain the beam power distribution along the two-dimen[...]
