Open AccessAutomated aberration correction of arbitrary laser modes in high numerical aperture systems
Author(s) -
Julian Hering,
Erik H. Waller,
Georg von Freymann
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.028500
Subject(s) - optics , point spread function , numerical aperture , laser , optical tweezers , lithography , physics , adaptive optics , spatial light modulator , aperture (computer memory) , spatial frequency , amplitude , phase retrieval , computer science , fourier transform , wavelength , quantum mechanics , acoustics
Controlling the point-spread-function in three-dimensional laser lithography is crucial for fabricating structures with highest definition and resolution. In contrast to microscopy, aberrations have to be physically corrected prior to writing, to create well defined doughnut modes, bottlebeams or multi foci modes. We report on a modified Gerchberg-Saxton algorithm for spatial-light-modulator based automated aberration compensation to optimize arbitrary laser-modes in a high numerical aperture system. Using circularly polarized light for the measurement and first-guess initial conditions for amplitude and phase of the pupil function our scalar approach outperforms recent algorithms with vectorial corrections. Besides laser lithography also applications like optical tweezers and microscopy might benefit from the method presented.