In this paper, we investigate a coherent imaging system based on Terahertz and mid-infrared (MIR) quantum cascade lasers (QCLs) in terms of phase sensitivity against optical feedback. In the self-mixing scheme, a single QCL acting as oscillator, mixer and detector of infrared radiation, is used for continuous-wave reflection imaging as well as phase profiling. We study the dependence of the phase signature on the optical feedback level and assess the limit for phase signal detection. © 2014 IEEE.
Continuous-wave reflection imaging using optical feedback interferometry in terahertz and mid-infrared quantum cascade lasers
Mezzapesa F P;Vitiello M S;
2014
Abstract
In this paper, we investigate a coherent imaging system based on Terahertz and mid-infrared (MIR) quantum cascade lasers (QCLs) in terms of phase sensitivity against optical feedback. In the self-mixing scheme, a single QCL acting as oscillator, mixer and detector of infrared radiation, is used for continuous-wave reflection imaging as well as phase profiling. We study the dependence of the phase signature on the optical feedback level and assess the limit for phase signal detection. © 2014 IEEE.File in questo prodotto:
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