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Measurement limitations in knife-edge tomographic phase retrieval of focused IR laser beams



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Silva López, Manuel y Rico-García, José María y Alda, Javier (2012) Measurement limitations in knife-edge tomographic phase retrieval of focused IR laser beams. Optics Express, 20 (21). pp. 23876-23886. ISSN 1094-4087

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URL Oficial: http://dx.doi.org/10.1364/OE.20.023875


An experimental setup to measure the three-dimensional phase-intensity distribution of an infrared laser beam in the focal region has been presented. It is based on the knife-edge method to perform a tomographic reconstruction and on a transport of intensity equation-based numerical method to obtain the propagating wavefront. This experimental approach allows us to characterize a focalized laser beam when the use of image or interferometer arrangements is not possible. Thus, we have recovered intensity and phase of an aberrated beam dominated by astigmatism. The phase evolution is fully consistent with that of the beam intensity along the optical axis. Moreover, this method is based on an expansion on both the irradiance and the phase information in a series of Zernike polynomials. We have described guidelines to choose a proper set of these polynomials depending on the experimental conditions and showed that, by abiding these criteria, numerical errors can be reduced.

Tipo de documento:Artículo
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En acceso abierto en la web del editor (comprobado en julio 2016).
Received 20 Jun 2012; revised 23 Jul 2012; accepted 23 Jul 2012; published 3 Oct 2012.

Palabras clave:Lasers ; Laser optics ; Laser beam characterization ; Tomographic image processing ; Phase retrieval ; Wafe-front sensing ; Optical antennas
Materias:Ciencias > Física > Electromagnetismo
Ciencias Biomédicas > Óptica y optometría > Técnicas de la imagen
Ciencias Biomédicas > Óptica y optometría > Óptica física, óptica cuántica
Ciencias Biomédicas > Óptica y optometría > Láseres
Código ID:38640
Depositado:08 Sep 2016 11:42
Última Modificación:19 Sep 2016 10:49

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