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Optica, Optics Express, 3(16), p. 1945, 2008

DOI: 10.1364/oe.16.001945

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Fiber strain sensor based on a π-phase-shifted Bragg grating and the Pound-Drever-Hall technique

Journal article published in 2008 by D. Gatti ORCID, G. Galzerano, D. Janner ORCID, S. Longhi ORCID, P. Laporta
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

A fiber strain sensor based on a pi-phase-shifted Bragg grating and an extended cavity diode laser is proposed. Locking the laser frequency to grating resonance by the Pound-Drever-Hall technique results in a strain power spectral density S-epsilon(f) = (3 x 10(-19) f(-1) + 2.6 x 10(-23)) epsilon(2)/Hz in the Fourier frequency range from 1 kHz to 10 MHz (epsilon being the applied strain), corresponding to a minimum sensitivity of 5 p epsilon Hz(-1/2) for frequencies larger than 100 kHz. (C) 2008 Optical Society of America.