Three-dimensional terahertz imaging using swept-frequency feedback interferometry with a quantum cascade laser

被引:35
作者
Keeley, J. [1 ]
Dean, P. [1 ]
Valavanis, A. [1 ]
Bertling, K. [2 ]
Lim, Y. L. [2 ]
Alhathlool, R. [1 ]
Taimre, T. [3 ]
Li, L. H. [1 ]
Indjin, D. [1 ]
Rakic, A. D. [2 ]
Linfield, E. H. [1 ]
Davies, A. G. [1 ]
机构
[1] Univ Leeds, Sch Elect & Elect Engn, Leeds LS2 9JT, W Yorkshire, England
[2] Univ Queensland, Sch Informat Technol & Elect Engn, Brisbane, Qld 4072, Australia
[3] Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia
基金
英国工程与自然科学研究理事会; 澳大利亚研究理事会;
关键词
LOCKING;
D O I
10.1364/OL.40.000994
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
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 mu m with a power noise spectral density below -50 dB/Hz, for a sampling time of 10 ms/pixel. (C) 2015 Optical Society of America
引用
收藏
页码:994 / 997
页数:4
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