RT Journal Article
T1 Measurement limitations in knife-edge tomographic phase retrieval of focused IR laser beams
A1 Silva López, Manuel
A1 Rico García, José María
A1 Alda Serrano, Javier
AB 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.
PB The Optical Society Of America
SN 1094-4087
YR 2012
FD 2012-10-08
LK https://hdl.handle.net/20.500.14352/45117
UL https://hdl.handle.net/20.500.14352/45117
LA eng
NO Optica Publishing Group. https://opg.optica.org/oe/viewmedia.cfm?uri=oe-20-21-23875&html=true. Accedido 8 de julio de 2024.
NO En acceso abierto en la web del editor (comprobado en julio 2016).
NO Ministerio de Ciencia, Innovación y Universidades (España)
DS Docta Complutense
RD 6 abr 2025