3D reconstruction of the complex dielectric function of glass during femtosecond laser micro-fabrication


We report on a new technique to reconstruct the 3D dielectric function change in transparent dielectric materials and the application of the technique for on-line monitoring of refractive index modification in BK7 glass during direct femtosecond laser microfabrication. The complex optical field scattered from the modified region is measured using two-beam, single-shot interferogram and the distribution of the modified refractive index is reconstructed by numerically solving the inverse scattering problem in Born approximation. The optical configuration suggested is further development of digital holographic microscopy. It takes advantage of high spatial resolution and almost the same optical paths for both interfering beams, and allows ultrafast time resolution. © Springer Science+Business Media, LLC. 2011.

Publication DOI: https://doi.org/10.1007/s11082-011-9496-1
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: The paper presents results reported at OWTNM-2010 conference. The original publication is available at www.springerlink.com
Uncontrolled Keywords: born approximation,digital holographic microscopy,femtosecond laser micro-fabrication,lnverse scattering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,Electrical and Electronic Engineering
Publication ISSN: 1572-817X
Last Modified: 02 Jan 2024 18:55
Date Deposited: 01 Apr 2014 08:00
Full Text Link: http://www.spri ... 5236585u767j13/
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2011-12
Authors: Turchin, Alexander
Dubov, Mykhaylo (ORCID Profile 0000-0002-6764-683X)
Williams, John A.R. (ORCID Profile 0000-0002-9554-6633)



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