@prefix dcat: . @prefix dct: . @prefix foaf: . @prefix vcard: . @prefix xsd: . a dcat:Dataset ; dct:description """ Dual-comb Fourier-transform spectroscopy takes advantage of an interferometer without moving parts. Interferences pattern between two femtosecond frequency combs, broadband laser sources whose spectra consist of evenly-spaced narrow lines, is measured. The measurement time and the spectral resolution are significantly improved compared to traditional Fourier spectrometers. However, the required short-term stability of the combs cannot be achieved by classic locking methods. Until now, no high-quality spectra could be recorded within a very short acquisition time. This thesis reports on the development of a real-time correction method able to compensate for the combs’ residual fluctuations and to restore non-distorted spectra. This analog technique does not require any locking system or a posteriori calculation. Its performance is demonstrated in the near-infrared (1.5 µm) and in the visible (520 nm) with fiber-based femtosecond lasers. Doppler-limited molecular spectra spanning 12 THz are measured within 500 µs. They are in excellent agreement with databases. For the first time, the full potential of dual-comb spectroscopy is demonstrated. The mid-infrared region is an attractive spectral range for molecular spectroscopy due to the molecules’ strong and characteristic absorptions. Therefore, extending dual-comb spectroscopy to this region is the next goal to achieve. Toward this goal, a comb emitting around 3 µm is characterized. It is based on the non-linear difference frequency generation from an erbium oscillator spectrally broadened with a highly non-linear fiber. """ ; dct:identifier "NNT: 2013PA112121" ; dct:issued "2026-05-10T02:14:59.073737"^^xsd:dateTime ; dct:language "fr" ; dct:modified "2026-05-10T02:14:59.073744"^^xsd:dateTime ; dct:publisher ; dct:title "Adaptive dual-comb spectroscopy" ; dcat:contactPoint [ a vcard:Organization ; vcard:fn "CCSD" ] ; dcat:distribution ; dcat:keyword "adaptive-sampling", "dual-comb-spectroscopy", "echantillonnage-adaptatif", "fourier-transform-spectroscopy", "infoeu-reposemanticsdoctoralthesis", "infrared-femtosecond-laser", "laser-femtoseconde-infrarouge", "mid-infrared-frequency-comb", "near-infrared-frequency-comb", "peigne-de-frequences-infrarouge-moyen", "peigne-de-frequences-proche-infrarouge", "physcondcm-genphysics-physicscondensed-matter-cond-matother-cond-matother", "spectroscopie-a-deux-peignes", "spectroscopie-par-transformation-de-fourier", "theses" ; dcat:landingPage . a dcat:Distribution ; dct:format "HTML" ; dct:issued "2026-05-10T02:14:59.075435"^^xsd:dateTime ; dct:modified "2026-05-10T02:14:59.054554"^^xsd:dateTime ; dct:title "Adaptive dual-comb spectroscopy" ; dcat:accessURL . a foaf:Agent ; foaf:name "test_moissonnage_selune" . a foaf:Document .