Open AccessDevelopment of a wavefront sensor for terahertz pulses
Author(s) -
Emmanuel Abraham,
Harsono Cahyadi,
Mathilde Brossard,
Jérôme Degert,
E. Freysz,
Takeshi Yasui
Publication year - 2016
Publication title -
hal (le centre pour la communication scientifique directe)
Language(s) - English
DOI - 10.1364/oe.24.005203.v002
Subject(s) - terahertz radiation , wavefront , wavefront sensor , optics , physics , computer science , optoelectronics , materials science
International audienceWavefront characterization of terahertz pulses is essential to optimize far-field intensity distribution of time-domain (imaging) spectrometers or increase the peak power of intense terahertz sources. In this paper, we report on the wavefront measurement of terahertz pulses using a Hartmann sensor associated with a 2D electro-optic imaging system composed of a ZnTe crystal and a CMOS camera. We quantitatively determined the deformations of planar and converging spherical wavefronts using the modal Zernike reconstruction least-squares method. Associated with deformable mirrors, the sensor will also open the route to terahertz adaptive optics