RAVARO, Marco; JAGTAP, Vishal; SANTARELLI, Giorgio; SIRTORI, Carlo; LI, Lianhe; KHANNA, S.P.; LINFIELD, Edmund; BARBIERI, Stefano

doi:10.1063/1.4793424

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RAVARO, Marco
Laboratoire Matériaux et Phénomènes Quantiques [MPQ (UMR_7162)]

JAGTAP, Vishal
Laboratoire Matériaux et Phénomènes Quantiques [MPQ (UMR_7162)]

SANTARELLI, Giorgio
lp2n-06,lp2n-14

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Applied Physics Letters. 2013-03-06, vol. 102, p. 091107

American Institute of Physics

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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.< Leer menos

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quantum cascade laser

terahertz

imaging

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Continuous-wave coherent imaging with terahertz quantum cascade lasers using electro-optic harmonic sampling

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