INVESTIGADORES
VAVELIUK Pablo
artículos
Título:
Limits of the paraxial approximation in laser beams
Autor/es:
VAVELIUK, P.; RUIZ, B.; LENCINA, A.
Revista:
OPTICS LETTERS
Editorial:
OPTICAL SOC AMER
Referencias:
Año: 2007 vol. 32 p. 927 - 929
ISSN:
0146-9592
Resumen:
The validity of the paraxial approximation for laser beams in free space is studied via an integral criterion based on the propagation invariants of Helmholtz and paraxial wave equations. This approach allows one to determine the paraxial limit for beams with nondefined spot size and for beams described by more parameters in addition to typical longitudinal wavelength and transverse waist. As examples, the paraxiality of higher-order Hermite, Laguerre, and Bessel-Gaussian beams was completely determined. This method could be extended to nonlinear optics and Bose condensates.
