1. Real-time terahertz imaging through self-mixing in a quantum-cascade laser
- Author
-
Nick Rothbart, Lutz Schrottke, Holger T. Grahn, Till Hagelschuer, Martin Wienold, Heinz-Wilhelm Hübers, and Klaus Biermann
- Subjects
Physics ,Physics and Astronomy (miscellaneous) ,Terahertz radiation ,business.industry ,self-mixing ,Far-infrared laser ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Laser ,Frame rate ,01 natural sciences ,law.invention ,Terahertz spectroscopy and technology ,010309 optics ,Photomixing ,Optics ,Terahertz Imaging ,law ,0103 physical sciences ,Quantum-cascade laser ,0210 nano-technology ,Quantum cascade laser ,business ,Phase modulation ,Institut für Optische Sensorsysteme - Abstract
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.
- Published
- 2016