INVESTIGADORES
MOREL Eneas Nicolas
artículos
Título:
Extending low-coherence interferometry dynamic range using heterodyne detection
Autor/es:
CUSATO, LESLIE JUDITH; CERROTTA, SANTIAGO; TORGA, JORGE ROMÁN; MOREL, ENEAS NICOLÁS
Revista:
OPTICS AND LASERS IN ENGINEERING
Editorial:
ELSEVIER SCI LTD
Referencias:
Año: 2020 vol. 131
ISSN:
0143-8166
Resumen:
Low-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.
