Reconstruction of refractive-index distribution in off-axis digital holography optical diffraction tomographic system

In the paper the optical diffraction tomographic system for reconstruction of the internal refractive index distribution in optical fiber utilizing grating Mach-Zehnder interferometer configuration is explored. The setup applies afocal imaging. Conventional grating application gives, however, highly...

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Bibliographic Details
Published in:Optics express 2009-08, Vol.17 (16), p.13758-13767
Main Authors: Kozacki, Tomasz, Krajewski, Rafal, Kujawińska, Małgorzata
Format: Article
Language:English
Subjects:
Computer Simulation
Computer-Aided Design
Equipment Design
Equipment Failure Analysis
Image Interpretation, Computer-Assisted - instrumentation
Light
Models, Theoretical
Optical Devices
Refractometry - instrumentation
Scattering, Radiation
Signal Processing, Computer-Assisted - instrumentation
Tomography, Optical - instrumentation
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Summary:In the paper the optical diffraction tomographic system for reconstruction of the internal refractive index distribution in optical fiber utilizing grating Mach-Zehnder interferometer configuration is explored. The setup applies afocal imaging. Conventional grating application gives, however, highly aberrated object beam producing incorrect refractive-index reconstructions. The grating inherent aberrations are characterized, its influence on both image projections and refractive index reconstructions is presented. To remove aberrations and enable tomographic reconstruction a novel digital holographic algorithm, correcting optical system imaging, is developed. The algorithm uses plane wave spectrum decomposition of optical field for solving diffraction problem between parallel and tilted planes and enabling correction of imaging system aberrations. The algorithm concept was successfully proved in simulations and the experiment.
ISSN:1094-4087
1094-4087
DOI:10.1364/oe.17.013758