NDLI: Modeling of astigmatic-elliptical beam shaping during fs-laser waveguide writing including beam truncation and diffraction effects

Content Provider	Springer Nature Link
Author	Ruiz De la Cruz, A. Ferrer, A. Hoyo, J. Siegel, J. Solis, J.
Copyright Year	2011
Abstract	In this work, we report a model for accurately calculating the focal volumes corresponding to astigmatic elliptical beams used in fs-laser waveguide writing. The model is based on the use of the ABCD matrix formalism for the propagation of a Gaussian beam. The code includes the effects of propagation on the astigmatic elliptical beam, and the effects of beam truncation and diffraction at the entrance pupil of the focusing objective due to beam clipping when overfilling the pupil. The results predict that for a given astigmatism value and propagation distance it is possible to efficiently suppress the astigmatic focus closer to the surface. This explains previous experimental results where single structure waveguides with controllable aspect-ratio were fabricated using astigmatic-elliptical beams. Furthermore, we investigate the respective roles of astigmatism and beam propagation, as well as the strong impact of truncation and diffraction effects caused by clipping the beam at the pupil of the focusing optics. Finally, based on the results from our model, we present some practical considerations in terms of beam propagation and phase wrapping constraints.
Starting Page	687
Ending Page	693
Page Count	7
File Format	PDF
ISSN	09478396
Journal	Applied Physics A
Volume Number	104
Issue Number	2
e-ISSN	14320630
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-02-10
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Characterization and Evaluation of Materials Condensed Matter Physics Surfaces and Interfaces, Thin Films Operating Procedures, Materials Treatment Nanotechnology Optical and Electronic Materials
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Science

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