Martín Mateos, PedroJerez González, BorjaLargo Izquierdo, PedroAcedo Gallardo, Pablo2023-01-302023-01-302018-04-16Martín-Mateos, P., Jerez, B., Largo-Izquierdo, P. & Acedo, P. (2018). Frequency accurate coherent electro-optic dual-comb spectroscopy in real-time. Optics Express, 26(8), 9700.1094-4087https://hdl.handle.net/10016/36409Electro-optic dual-comb spectrometers have proved to be a promising technology for sensitive, high-resolution and rapid spectral measurements. Electro-optic combs possess very attractive features like simplicity. reliability, bright optical teeth, and typically moderate but quickly tunable optical spans. Furthermore; in a dual-comb arrangement; narrowband electro-optic combs are generated with a level of mutual coherence that is sufficiently high to enable optical multiheterodyning Without inter-comb stabilization or signal processing systems. However, this valuable tool still presents several limitations, for instance; on most systems; absolute frequency accuracy and long-term stability cannot be guaranteed; likewise; interferometer-induced phase noise restricts coherence time and limits the attainable signal-to-noise ratio. In this paper, We address these drawbacks and demonstrate a cost-efficient absolute electro-optic dual-comb instrument based on a frequency stabilization mechanism and a novel adaptive interferogram acquisition approach devised for electro-optic dual-combs capable of operating in real-time. The spectrometer, completely built from commercial components, provides sub-ppm frequency uncertainties and enables a signal-to-noise ratio of 10000 (intensity noise) in 30 seconds of integration time.14eng© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.Adaptive OpticsSignal ProcessingSpectrometersStabilizationAbsolute frequencyCommercial componentsFrequency stabilizationIntegration timeLong term stabilityMutual coherenceSignal processing systemsSpectral measurementSignal to noise ratioresearch articleElectrónicahttps://doi.org/10.1364/OE.26.009700open access970089713Optics Express26AR/0000021425