Brossard Mathilde, Sauvage Jean-François, Perrin Mathias, Abraham Emmanuel
Opt Lett. 2018 Apr 1;43(7):1594-1597. doi: 10.1364/OL.43.001594.
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.
我们报道了利用自适应光学对太赫兹（THz）光束进行波前校正的研究，这需要一个能够感知光学像差的波前传感器以及一个波前校正器。该波前传感器依赖于一个由碲化锌（ZnTe）晶体和互补金属氧化物半导体（CMOS）相机组成的直接二维电光成像系统。通过测量晶体中太赫兹电场的相位变化，借助可变形镜的作用，我们能够将光束的几何像差降至最低。这种相位控制将为太赫兹自适应光学开辟道路以便为实际应用和基础应用优化太赫兹光束质量。
