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Communication Dans Un Congrès Année : 1999

Optical low coherence reflectometry : New developments

Résumé

Optical low-coherence reflectometry (OLCR) is a technique based on interferometry which is design to detect and localize reflectors[l]. This technique has been widely investigated. It is now possible to scan samples with high spatial resolution and constant high speed [2]. However, the envelopes of the interferograms are usually considered as the essential part of the measurement results. We report here on an OLCR experimental set-up designed to obtain simultaneously high accuracy, high stability and high reproducibility on the location of propagation defects along optical waveguides. One of our objectives is to get informations of the phase in the Fourier transform. We firstly describe the fringe counting system which is used to measure the length of the reflectometer reference arm and to trigger the interferograms sampling. We secondly describe the third interferometer coupled to a white light source whose response starts the fringe counting. We use our system as a spectrometer to test the stability and the reproducibility. Sources with very different broad spectra are investigated. One of them is filtered through a Fibre Bragg grating sample under stress and the results are plotted against the stress conditions.
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Dates et versions

hal-00935124 , version 1 (05-02-2014)

Identifiants

  • HAL Id : hal-00935124 , version 1

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Cyril Lupi, Dominique Leduc, Bruno Froppier, Eric Tanguy, Guy Normand, et al.. Optical low coherence reflectometry : New developments. Optical Fiber Measurement Conference, Sep 1999, Nantes, France. pp.1. ⟨hal-00935124⟩
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