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Dispersion effects in a highly birefringent fiber laser sensor with fiber Bragg grating reflectors

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Abstract

The effects of dispersion in the highly birefringent fiber Bragg grating reflectors of a polarimetric elliptical-core fiber laser sensor are experimentally and theoretically investigated. The laser sensor is designed to measure fluid pressure. It is experimentally and theoretically shown that the wavelength-dependent phase shifts in the gratings can be employed to remove the near degeneracy of the polarization mode beat frequencies of a given order, which substantially improves the resolution of the sensor. A resolution of a few parts in 106 of the free spectral range of the laser is demonstrated.

© 2002 Optical Society of America

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