Continuous-wave coherent imaging with terahertz quantum cascade lasers using electro-optic harmonic sampling
Language
en
Article de revue
This item was published in
Applied Physics Letters. 2013-03-06, vol. 102, p. 091107
American Institute of Physics
English Abstract
We demonstrate a coherent imaging system based on a terahertz (THz) frequency quantum cascade laser (QCL) phase-locked to a near-infrared fs-laser comb. The phase locking enables coherent electro-optic sampling of the ...Read more >
We demonstrate a coherent imaging system based on a terahertz (THz) frequency quantum cascade laser (QCL) phase-locked to a near-infrared fs-laser comb. The phase locking enables coherent electro-optic sampling of the continuous-wave radiation emitted by the QCL through the generation of a heterodyne beat-note signal. We use this beat-note signal to demonstrate raster scan coherent imaging using a QCL emitting at 2.5 THz. At this frequency the detection noise floor of our system is of 3 pW/Hz and the long-term phase stability is <3°/h, limited by the mechanical stability of the apparatus.Read less <
Portuguese Keywords
quantum cascade laser
terahertz
imaging
Origin
Hal imported