Title
Phase shifting and phase retrieval with a fully automated laser diode system Phase shifting and phase retrieval with a fully automated laser diode system
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Washington :OSA ,
Subject
Physics
Source (journal)
Applied optics. - Washington
Volume/pages
54(2015) :33 , p. 9896-9901
ISSN
1559-128X
ISI
000364988100036
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
A low-cost and fully automated process for phase-shifting interferometry (PSI) by continuously changing the input voltage of a laser diode (LD) under the scheme of an unbalanced Twyman-Green interferometer (TGI) setup is presented. The input signal of a LD is controlled by a data acquisition (NI-DAQ) device that allows it to change its wavelength according to its tunability features. The automation and data analysis will be done using LabVIEW in combination with MATLAB. The phase map is obtained using the Carre algorithm. Measurements of visibility and phase shift to verify the PSI requirements are shown. It is demonstrated with experimental results and statistical analysis that the phase retrieval can be successfully achieved without calibration and using minimal optical devices. (C) 2015 Optical Society of America
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