Abstract- Interferometric Terahertz Wavefront Analysis

 Emmanuel Abraham,  Takayuki Ogawa,  Mathilde Brossard,   Takeshi Yasu

http://ieeexplore.ieee.org/document/7781635/

Wavefront characterization of terahertz beams is useful for various applications such as terahertz spectroscopy and imaging. In this paper, we report on the aberration measurement of a terahertz beam issued from a quantum cascade laser. By using a terahertz camera and a two-wave noncommon path interferometer, we measured the wavefront distortions. As an example, we evaluated the Zernike coefficients giving the aberrations of spherical wavefronts induced by a converging lens. Associated with a deformable mirror, the sensor will open the route to terahertz adaptive optics.

Abstract-Abstract-Terahertz Wavefront Characterization using a Hartmann Sensor Combined with 2D Electro-Optic Imaging

H. Cahyadi, J. Degert, E. Freysz, T. Yasui,  E. Abraham,

https://www.osapublishing.org/abstract.cfm?URI=cleopr-2015-27P_11

Two-dimension electro-optic imaging combined with a Hartmann sensor enables THz wavefront characterization in time- and frequency-domain without cross-section scanning. Reconstruction with Zernike polynomials method allows qualitative and quantitative analysis as additional advantages.

© 2015 IEEE

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