Terahertz adaptive optics with a deformable mirror

We report on the wavefront correction of a terahertz (THz) beam using adaptive optics, which requires both a wavefront sensor that is able to sense the optical aberrations, as well as a wavefront corrector. The wavefront sensor relies on a direct 2D electro-optic imaging system composed of a ZnTe cr...

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Bibliographic Details
Published in:Optics letters 2018-04, Vol.43 (7), p.1594-1597
Main Authors: Brossard, Mathilde, Sauvage, Jean-François, Perrin, Mathias, Abraham, Emmanuel
Format: Article
Language:English
Subjects:
Adaptive control
Adaptive optics
CMOS
Deformation
Formability
Optics
Phase control
Physics
Zinc tellurides
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Summary:We report on the wavefront correction of a terahertz (THz) beam using adaptive optics, which requires both a wavefront sensor that is able to sense the optical aberrations, as well as a wavefront corrector. The wavefront sensor relies on a direct 2D electro-optic imaging system composed of a ZnTe crystal and a CMOS camera. By measuring the phase variation of the THz electric field in the crystal, we were able to minimize the geometrical aberrations of the beam, thanks to the action of a deformable mirror. This phase control will open the route to THz adaptive optics in order to optimize the THz beam quality for both practical and fundamental applications.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.43.001594