Interferometric Terahertz Wavefront Analysis

Abstract : 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 interferom-eter, 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.
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IEEE Journal of Selected Topics in Quantum Electronics, Institute of Electrical and Electronics Engineers, 2017, 23 (4), pp.8400505 (1 - 5). 〈10.1109/JSTQE.2016.2638540〉
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Emmanuel Abraham, Takayuki Ogawa, Mathilde Brossard, Takeshi Yasui. Interferometric Terahertz Wavefront Analysis. IEEE Journal of Selected Topics in Quantum Electronics, Institute of Electrical and Electronics Engineers, 2017, 23 (4), pp.8400505 (1 - 5). 〈10.1109/JSTQE.2016.2638540〉. 〈hal-01495946〉

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