Real-time terahertz imaging through self-mixing in a quantum-cascade laser
Real-time terahertz imaging through self-mixing in a quantum-cascade laser
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DOI：
10.1063/1.4955405
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发表时间：
2016-07
影响因子：
4
通讯作者：
M. Wienold;T. Hagelschuer;N. Rothbart;L. Schrottke;K. Biermann;H. Grahn;H. Hübers
中科院分区：
文献类型：
--
作者：
M. Wienold;T. Hagelschuer;N. Rothbart;L. Schrottke;K. Biermann;H. Grahn;H. Hübers
我们报道了一种基于量子级联激光器和扫描镜的快速自混合实时相干太赫兹成像方法。由于太赫兹光束的快速偏转，获得了帧速率高达几Hz的图像，最终受到所采用的扫描镜的机械惯性的限制。相位调制技术允许振幅和相位信息的分离，而不需要参数拟合例程。我们进一步展示了透射成像的潜力。
We report on a fast self-mixing approach for real-time, coherent terahertz imaging based on a quantum-cascade laser and a scanning mirror. Due to a fast deflection of the terahertz beam, images with frame rates up to several Hz are obtained, eventually limited by the mechanical inertia of the employed scanning mirror. A phase modulation technique allows for the separation of the amplitude and phase information without the necessity of parameter fitting routines. We further demonstrate the potential for transmission imaging.