2020-07-172020-07-172020-08Leslie Judith Cusato, Santiago Cerrotta, Jorge Román Torga, Eneas Nicolás Morel "Extending low-coherence interferometry dynamic range using heterodyne detection "- Optics and Lasers in Engineering - Volume 131, August 2020, 106106http://hdl.handle.net/20.500.12272/4485Low-coherence interferometry (LCI) technique is generating considerable interest in industrial applications where there is a need for larger measurements with high resolution. Conventional Fourier domain systems reach a limiting depth of around 3 mm, mainly due to the spectrometers used as detectors. In this work, we present an optical detection system that performs the Fourier transform of the LCI signals, based on a spatial heterodyne spectrometer. This device avoids the fall-off effect of the spectrometer, allowing to reach measurable optical depths of almost 5 cm without losing resolution. We describe the theory underlying this detection system and present experimental results which are in great accordance.application/pdfenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Atribución-NoComercial-CompartirIgual 4.0 InternacionalUTNFacultad Regional DeltaLow-coherence interferometryDynamic rangeHeterodyne detectionFourier transform spectroscopyOptical coherence tomographyinfo:eu-repo/semantics/articleTorga, Jorge RománAtribución – No Comercial – Compartir Igual (by-nc-sa)10.1016/j.optlaseng.2020.106106