Abstract

We demonstrate an innovative method for a real-time interrogation of fiber Bragg gratings based on low-coherence spectral interferometry of noiselike pulses. By analyzing the spectral interference at the output of a Michelson interferometer we obtained the impulse response of the grating with a time resolution of $\sim 350 \mathrm{fs}$. Using the Gabor transformation, we could directly detect nonuniform regions inside the grating and could measure the spatial dependence of the resonance wavelength along the grating.

© 2001 Optical Society of America

Data storage in optical fibers and reconstruction by use of low-coherence spectral interferometry

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