Three-dimensional terahertz imaging using swept-frequency feedback interferometry with a quantum cascade laser.
نویسندگان
چکیده
We demonstrate coherent three-dimensional terahertz imaging by frequency modulation of a quantum cascade laser in a compact and experimentally simple self-mixing scheme. Through this approach, we can realize significantly faster acquisition rates compared to previous schemes employing longitudinal mechanical scanning of a sample. We achieve a depth resolution of better than 0.1 μm with a power noise spectral density below -50 dB/Hz, for a sampling time of 10 ms/pixel.
منابع مشابه
Coherent THz imaging using the self-mixing effect in quantum cascade lasers
We demonstrate that the self-mixing effect in terahertz frequency quantum cascade lasers can be used for three-dimensional coherent imaging; swept-frequency interferometry for imaging and materials analysis; and, high-resolution inverse synthetic aperture radar imaging. OCIS codes: (110.6795) Terahertz imaging; (140.5965) Semiconductor lasers, quantum cascade
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عنوان ژورنال:
- Optics letters
دوره 40 6 شماره
صفحات -
تاریخ انتشار 2015