Grupo de Optoelectrónica

Permanent URI for this collectionhttp://48.217.138.120/handle/20.500.12272/1239

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Subject: search.filters.subject.Optical Variables Measurement

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    Feasibility and analysis of a system of two in tandem interferometers for optical coherence tomography
    (IEE Explore Digital Library, 2017-12-18) Cerrotta, Santiago; Morel, Eneas Nicolás; Alvira, Fernando; Torga, Jorge Román
    A signal obtained from a combined system of two interferometers of low coherence in the frequency domain is presented and analyzed. This system allows to expand the range of measurement offered by the conventional optical tomography system of a single interferometer with a spectrometer as a detector.
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    Large Axial Range Frequency-Domain Optical Low Coherence Interferometry
    (2019-01-15) Cerrotta, Santiago; Morel, Eneas Nicolás; Alvira, Fernando; Torga, Jorge Román
    In this paper, we propose a new experimental setup to extend the measurement range of frequency-domain low coherence interferometry (FD-LCI) from 3 mm to 2 cm. The FD-LCI can be extended to the technique of frequency domain optical coherence tomography (FD-OCT) by performing additional lateral scanning. This new and simple arrangement just attaches an extra interferometer before the spectrometer in a typical FD-LCI setup. With this configuration, it is possible to overcome the limitation of the dynamic range of the conventional technique. This allows us to measure the optical path difference of the sample of interest, which is outside the detection range of the spectrometer, using an extra interferometer as a tuner system. In addition, this tuning allows significant minimization of the effects produced by the fall-off. The accuracy of the new system is obtained by adding the FD-LCI and the tuning micrometric translator accuracies. In our experimental setup, this value is 20 μm.