Article (Scientific journals)
Iterative Phase Retrieval Assisted Off-Axis Terahertz Digital Holography
Zhao, Yuchen; Vandenrijt, Jean-François; Kirkove, Murielle et al.
2019In Applied Optics, 58 (32)
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Abstract :
[en] In THz digital holography, the off-axis configuration is the appropriate choice when the investigated object is non-sparse and complex. The limitation of recording distance in off-axis configuration restricts the imaging quality. Either low resolution or spectra overlap can potentially occur. We propose an iterative phase retrieval approach to improve the quality of reconstruction results obtained from off-axis hologram. One additional capture of object wave intensity is recorded to perform iterative phase retrieval with off-axis reconstruction as the initial guess. Apodization operation can be applied to the object wave intensity capture to suppress undesired border diffraction effects. The image quality using the proposed method has been improved both from simulation and experimental verification.
Research center :
STAR - Space sciences, Technologies and Astrophysics Research - ULiège
Disciplines :
Physics
Author, co-author :
Zhao, Yuchen ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Vandenrijt, Jean-François  ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Kirkove, Murielle  ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Georges, Marc ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Language :
English
Title :
Iterative Phase Retrieval Assisted Off-Axis Terahertz Digital Holography
Publication date :
23 October 2019
Journal title :
Applied Optics
ISSN :
1559-128X
eISSN :
2155-3165
Publisher :
Optical Society of America, Washington, United States - District of Columbia
Volume :
58
Issue :
32
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
TERA4ALL
Funders :
FEDER - Fonds Européen de Développement Régional [BE]
Région wallonne [BE]
Available on ORBi :
since 30 October 2019

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